| Message ID | 20220819014406.32266-1-wangkefeng.wang@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | kernel: exit: cleanup release_thread() | expand |
For csky part Acked-by: Guo Ren <guoren@kernel.org> On Fri, Aug 19, 2022 at 9:39 AM Kefeng Wang <wangkefeng.wang@huawei.com> wrote: > > Only x86 has own release_thread(), introduce a new weak > release_thread() function to clean empty definitions in > other ARCHs. > > Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> > --- > arch/alpha/include/asm/processor.h | 2 -- > arch/alpha/kernel/process.c | 5 ----- > arch/arc/include/asm/processor.h | 3 --- > arch/arm/include/asm/processor.h | 3 --- > arch/arm/kernel/process.c | 4 ---- > arch/arm64/include/asm/processor.h | 3 --- > arch/arm64/kernel/process.c | 4 ---- > arch/csky/include/asm/processor.h | 5 ----- > arch/hexagon/include/asm/processor.h | 4 ---- > arch/hexagon/kernel/process.c | 7 ------- > arch/ia64/include/asm/processor.h | 7 ------- > arch/loongarch/include/asm/processor.h | 3 --- > arch/m68k/include/asm/processor.h | 5 ----- > arch/microblaze/include/asm/processor.h | 5 ----- > arch/mips/include/asm/processor.h | 3 --- > arch/nios2/include/asm/processor.h | 5 ----- > arch/openrisc/include/asm/processor.h | 1 - > arch/openrisc/kernel/process.c | 4 ---- > arch/parisc/include/asm/processor.h | 3 --- > arch/parisc/kernel/process.c | 4 ---- > arch/powerpc/include/asm/processor.h | 1 - > arch/powerpc/kernel/process.c | 5 ----- > arch/riscv/include/asm/processor.h | 5 ----- > arch/s390/include/asm/processor.h | 3 --- > arch/sh/include/asm/processor_32.h | 3 --- > arch/sh/kernel/process_32.c | 5 ----- > arch/sparc/include/asm/processor_32.h | 3 --- > arch/sparc/include/asm/processor_64.h | 3 --- > arch/um/include/asm/processor-generic.h | 4 ---- > arch/x86/include/asm/processor.h | 3 --- > arch/xtensa/include/asm/processor.h | 3 --- > include/linux/sched/task.h | 3 +++ > kernel/exit.c | 4 ++++ > 33 files changed, 7 insertions(+), 118 deletions(-) > > diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h > index 43e234c518b1..714abe494e5f 100644 > --- a/arch/alpha/include/asm/processor.h > +++ b/arch/alpha/include/asm/processor.h > @@ -36,8 +36,6 @@ extern void start_thread(struct pt_regs *, unsigned long, unsigned long); > > /* Free all resources held by a thread. */ > struct task_struct; > -extern void release_thread(struct task_struct *); > - > unsigned long __get_wchan(struct task_struct *p); > > #define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc) > diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c > index e2e25f8b5e76..dbf1bc5e2ad2 100644 > --- a/arch/alpha/kernel/process.c > +++ b/arch/alpha/kernel/process.c > @@ -225,11 +225,6 @@ flush_thread(void) > current_thread_info()->pcb.unique = 0; > } > > -void > -release_thread(struct task_struct *dead_task) > -{ > -} > - > /* > * Copy architecture-specific thread state > */ > diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h > index 54db9d7bb562..fb844fce1ab6 100644 > --- a/arch/arc/include/asm/processor.h > +++ b/arch/arc/include/asm/processor.h > @@ -43,9 +43,6 @@ struct task_struct; > #define task_pt_regs(p) \ > ((struct pt_regs *)(THREAD_SIZE + (void *)task_stack_page(p)) - 1) > > -/* Free all resources held by a thread */ > -#define release_thread(thread) do { } while (0) > - > /* > * A lot of busy-wait loops in SMP are based off of non-volatile data otherwise > * get optimised away by gcc > diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h > index bdc35c0e8dfb..326864f79d18 100644 > --- a/arch/arm/include/asm/processor.h > +++ b/arch/arm/include/asm/processor.h > @@ -81,9 +81,6 @@ static inline void arch_thread_struct_whitelist(unsigned long *offset, > /* Forward declaration, a strange C thing */ > struct task_struct; > > -/* Free all resources held by a thread. */ > -extern void release_thread(struct task_struct *); > - > unsigned long __get_wchan(struct task_struct *p); > > #define task_pt_regs(p) \ > diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c > index 3d9cace63884..712d3e6d9be9 100644 > --- a/arch/arm/kernel/process.c > +++ b/arch/arm/kernel/process.c > @@ -232,10 +232,6 @@ void flush_thread(void) > thread_notify(THREAD_NOTIFY_FLUSH, thread); > } > > -void release_thread(struct task_struct *dead_task) > -{ > -} > - > asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); > > int copy_thread(struct task_struct *p, const struct kernel_clone_args *args) > diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h > index 86eb0bfe3b38..4cfb4cd1d475 100644 > --- a/arch/arm64/include/asm/processor.h > +++ b/arch/arm64/include/asm/processor.h > @@ -323,9 +323,6 @@ static inline bool is_ttbr1_addr(unsigned long addr) > /* Forward declaration, a strange C thing */ > struct task_struct; > > -/* Free all resources held by a thread. */ > -extern void release_thread(struct task_struct *); > - > unsigned long __get_wchan(struct task_struct *p); > > void update_sctlr_el1(u64 sctlr); > diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c > index 92bcc1768f0b..9015f49c206e 100644 > --- a/arch/arm64/kernel/process.c > +++ b/arch/arm64/kernel/process.c > @@ -279,10 +279,6 @@ void flush_thread(void) > flush_tagged_addr_state(); > } > > -void release_thread(struct task_struct *dead_task) > -{ > -} > - > void arch_release_task_struct(struct task_struct *tsk) > { > fpsimd_release_task(tsk); > diff --git a/arch/csky/include/asm/processor.h b/arch/csky/include/asm/processor.h > index 9638206bc44f..63ad71fab30d 100644 > --- a/arch/csky/include/asm/processor.h > +++ b/arch/csky/include/asm/processor.h > @@ -69,11 +69,6 @@ do { \ > /* Forward declaration, a strange C thing */ > struct task_struct; > > -/* Free all resources held by a thread. */ > -static inline void release_thread(struct task_struct *dead_task) > -{ > -} > - > /* Prepare to copy thread state - unlazy all lazy status */ > #define prepare_to_copy(tsk) do { } while (0) > > diff --git a/arch/hexagon/include/asm/processor.h b/arch/hexagon/include/asm/processor.h > index 615f7e49968e..0cd39c2cdf8f 100644 > --- a/arch/hexagon/include/asm/processor.h > +++ b/arch/hexagon/include/asm/processor.h > @@ -60,10 +60,6 @@ struct thread_struct { > #define KSTK_EIP(tsk) (pt_elr(task_pt_regs(tsk))) > #define KSTK_ESP(tsk) (pt_psp(task_pt_regs(tsk))) > > -/* Free all resources held by a thread; defined in process.c */ > -extern void release_thread(struct task_struct *dead_task); > - > -/* Get wait channel for task P. */ > extern unsigned long __get_wchan(struct task_struct *p); > > /* The following stuff is pretty HEXAGON specific. */ > diff --git a/arch/hexagon/kernel/process.c b/arch/hexagon/kernel/process.c > index f0552f98a7ba..e15eeaebd785 100644 > --- a/arch/hexagon/kernel/process.c > +++ b/arch/hexagon/kernel/process.c > @@ -112,13 +112,6 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args) > return 0; > } > > -/* > - * Release any architecture-specific resources locked by thread > - */ > -void release_thread(struct task_struct *dead_task) > -{ > -} > - > /* > * Some archs flush debug and FPU info here > */ > diff --git a/arch/ia64/include/asm/processor.h b/arch/ia64/include/asm/processor.h > index 757c2f6d8d4b..d1978e004054 100644 > --- a/arch/ia64/include/asm/processor.h > +++ b/arch/ia64/include/asm/processor.h > @@ -318,13 +318,6 @@ struct thread_struct { > struct mm_struct; > struct task_struct; > > -/* > - * Free all resources held by a thread. This is called after the > - * parent of DEAD_TASK has collected the exit status of the task via > - * wait(). > - */ > -#define release_thread(dead_task) > - > /* Get wait channel for task P. */ > extern unsigned long __get_wchan (struct task_struct *p); > > diff --git a/arch/loongarch/include/asm/processor.h b/arch/loongarch/include/asm/processor.h > index 1c4b4308378d..6954dc5d24e9 100644 > --- a/arch/loongarch/include/asm/processor.h > +++ b/arch/loongarch/include/asm/processor.h > @@ -176,9 +176,6 @@ struct thread_struct { > > struct task_struct; > > -/* Free all resources held by a thread. */ > -#define release_thread(thread) do { } while (0) > - > enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_HALT, IDLE_NOMWAIT, IDLE_POLL}; > > extern unsigned long boot_option_idle_override; > diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h > index d86b4009880b..7a2da780830b 100644 > --- a/arch/m68k/include/asm/processor.h > +++ b/arch/m68k/include/asm/processor.h > @@ -145,11 +145,6 @@ static inline void start_thread(struct pt_regs * regs, unsigned long pc, > /* Forward declaration, a strange C thing */ > struct task_struct; > > -/* Free all resources held by a thread. */ > -static inline void release_thread(struct task_struct *dead_task) > -{ > -} > - > unsigned long __get_wchan(struct task_struct *p); > void show_registers(struct pt_regs *regs); > > diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h > index 7e9e92670df3..4e193c7550df 100644 > --- a/arch/microblaze/include/asm/processor.h > +++ b/arch/microblaze/include/asm/processor.h > @@ -63,11 +63,6 @@ struct thread_struct { > .pgdir = swapper_pg_dir, \ > } > > -/* Free all resources held by a thread. */ > -static inline void release_thread(struct task_struct *dead_task) > -{ > -} > - > unsigned long __get_wchan(struct task_struct *p); > > /* The size allocated for kernel stacks. This _must_ be a power of two! */ > diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h > index 4bb24579d12e..3fde1ff72bd1 100644 > --- a/arch/mips/include/asm/processor.h > +++ b/arch/mips/include/asm/processor.h > @@ -344,9 +344,6 @@ struct thread_struct { > > struct task_struct; > > -/* Free all resources held by a thread. */ > -#define release_thread(thread) do { } while(0) > - > /* > * Do necessary setup to start up a newly executed thread. > */ > diff --git a/arch/nios2/include/asm/processor.h b/arch/nios2/include/asm/processor.h > index b8125dfbcad2..8916d93d5c2d 100644 > --- a/arch/nios2/include/asm/processor.h > +++ b/arch/nios2/include/asm/processor.h > @@ -64,11 +64,6 @@ extern void start_thread(struct pt_regs *regs, unsigned long pc, > > struct task_struct; > > -/* Free all resources held by a thread. */ > -static inline void release_thread(struct task_struct *dead_task) > -{ > -} > - > extern unsigned long __get_wchan(struct task_struct *p); > > #define task_pt_regs(p) \ > diff --git a/arch/openrisc/include/asm/processor.h b/arch/openrisc/include/asm/processor.h > index aa1699c18add..ed9efb430afa 100644 > --- a/arch/openrisc/include/asm/processor.h > +++ b/arch/openrisc/include/asm/processor.h > @@ -72,7 +72,6 @@ struct thread_struct { > > > void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp); > -void release_thread(struct task_struct *); > unsigned long __get_wchan(struct task_struct *p); > > #define cpu_relax() barrier() > diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c > index 52dc983ddeba..f94b5ec06786 100644 > --- a/arch/openrisc/kernel/process.c > +++ b/arch/openrisc/kernel/process.c > @@ -125,10 +125,6 @@ void show_regs(struct pt_regs *regs) > show_registers(regs); > } > > -void release_thread(struct task_struct *dead_task) > -{ > -} > - > /* > * Copy the thread-specific (arch specific) info from the current > * process to the new one p > diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h > index 4621ceb51314..a608970b249a 100644 > --- a/arch/parisc/include/asm/processor.h > +++ b/arch/parisc/include/asm/processor.h > @@ -266,9 +266,6 @@ on downward growing arches, it looks like this: > > struct mm_struct; > > -/* Free all resources held by a thread. */ > -extern void release_thread(struct task_struct *); > - > extern unsigned long __get_wchan(struct task_struct *p); > > #define KSTK_EIP(tsk) ((tsk)->thread.regs.iaoq[0]) > diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c > index 7c37e09c92da..3db0e97e6c06 100644 > --- a/arch/parisc/kernel/process.c > +++ b/arch/parisc/kernel/process.c > @@ -146,10 +146,6 @@ void flush_thread(void) > */ > } > > -void release_thread(struct task_struct *dead_task) > -{ > -} > - > /* > * Idle thread support > * > diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h > index fdfaae194ddd..92e332415d02 100644 > --- a/arch/powerpc/include/asm/processor.h > +++ b/arch/powerpc/include/asm/processor.h > @@ -75,7 +75,6 @@ extern int _chrp_type; > > struct task_struct; > void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp); > -void release_thread(struct task_struct *); > > #define TS_FPR(i) fp_state.fpr[i][TS_FPROFFSET] > #define TS_CKFPR(i) ckfp_state.fpr[i][TS_FPROFFSET] > diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c > index 0fbda89cd1bb..991cda25b9a9 100644 > --- a/arch/powerpc/kernel/process.c > +++ b/arch/powerpc/kernel/process.c > @@ -1655,11 +1655,6 @@ EXPORT_SYMBOL_GPL(set_thread_tidr); > > #endif /* CONFIG_PPC64 */ > > -void > -release_thread(struct task_struct *t) > -{ > -} > - > /* > * this gets called so that we can store coprocessor state into memory and > * copy the current task into the new thread. > diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h > index 19eedd4af4cd..94a0590c6971 100644 > --- a/arch/riscv/include/asm/processor.h > +++ b/arch/riscv/include/asm/processor.h > @@ -65,11 +65,6 @@ static inline void arch_thread_struct_whitelist(unsigned long *offset, > extern void start_thread(struct pt_regs *regs, > unsigned long pc, unsigned long sp); > > -/* Free all resources held by a thread. */ > -static inline void release_thread(struct task_struct *dead_task) > -{ > -} > - > extern unsigned long __get_wchan(struct task_struct *p); > > > diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h > index bd66f8e34949..c52fe651eeba 100644 > --- a/arch/s390/include/asm/processor.h > +++ b/arch/s390/include/asm/processor.h > @@ -186,9 +186,6 @@ struct pt_regs; > void show_registers(struct pt_regs *regs); > void show_cacheinfo(struct seq_file *m); > > -/* Free all resources held by a thread. */ > -static inline void release_thread(struct task_struct *tsk) { } > - > /* Free guarded storage control block */ > void guarded_storage_release(struct task_struct *tsk); > void gs_load_bc_cb(struct pt_regs *regs); > diff --git a/arch/sh/include/asm/processor_32.h b/arch/sh/include/asm/processor_32.h > index 45240ec6b85a..27aebf1e75a2 100644 > --- a/arch/sh/include/asm/processor_32.h > +++ b/arch/sh/include/asm/processor_32.h > @@ -127,9 +127,6 @@ struct task_struct; > > extern void start_thread(struct pt_regs *regs, unsigned long new_pc, unsigned long new_sp); > > -/* Free all resources held by a thread. */ > -extern void release_thread(struct task_struct *); > - > /* > * FPU lazy state save handling. > */ > diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c > index a808843375e7..92b6649d4929 100644 > --- a/arch/sh/kernel/process_32.c > +++ b/arch/sh/kernel/process_32.c > @@ -84,11 +84,6 @@ void flush_thread(void) > #endif > } > > -void release_thread(struct task_struct *dead_task) > -{ > - /* do nothing */ > -} > - > asmlinkage void ret_from_fork(void); > asmlinkage void ret_from_kernel_thread(void); > > diff --git a/arch/sparc/include/asm/processor_32.h b/arch/sparc/include/asm/processor_32.h > index b26c35336b51..ba8b70ffec08 100644 > --- a/arch/sparc/include/asm/processor_32.h > +++ b/arch/sparc/include/asm/processor_32.h > @@ -80,9 +80,6 @@ static inline void start_thread(struct pt_regs * regs, unsigned long pc, > : "memory"); > } > > -/* Free all resources held by a thread. */ > -#define release_thread(tsk) do { } while(0) > - > unsigned long __get_wchan(struct task_struct *); > > #define task_pt_regs(tsk) ((tsk)->thread.kregs) > diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/processor_64.h > index 89850dff6b03..2667f35d5ea5 100644 > --- a/arch/sparc/include/asm/processor_64.h > +++ b/arch/sparc/include/asm/processor_64.h > @@ -176,9 +176,6 @@ do { \ > regs->tstate &= ~TSTATE_PEF; \ > } while (0) > > -/* Free all resources held by a thread. */ > -#define release_thread(tsk) do { } while (0) > - > unsigned long __get_wchan(struct task_struct *task); > > #define task_pt_regs(tsk) (task_thread_info(tsk)->kregs) > diff --git a/arch/um/include/asm/processor-generic.h b/arch/um/include/asm/processor-generic.h > index d0fc1862da95..bb5f06480da9 100644 > --- a/arch/um/include/asm/processor-generic.h > +++ b/arch/um/include/asm/processor-generic.h > @@ -55,10 +55,6 @@ struct thread_struct { > .request = { 0 } \ > } > > -static inline void release_thread(struct task_struct *task) > -{ > -} > - > /* > * User space process size: 3GB (default). > */ > diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h > index 356308c73951..67c9d73b31fa 100644 > --- a/arch/x86/include/asm/processor.h > +++ b/arch/x86/include/asm/processor.h > @@ -587,9 +587,6 @@ static inline void load_sp0(unsigned long sp0) > > #endif /* CONFIG_PARAVIRT_XXL */ > > -/* Free all resources held by a thread. */ > -extern void release_thread(struct task_struct *); > - > unsigned long __get_wchan(struct task_struct *p); > > /* > diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h > index 76bc63127c66..5abde43c570c 100644 > --- a/arch/xtensa/include/asm/processor.h > +++ b/arch/xtensa/include/asm/processor.h > @@ -221,9 +221,6 @@ struct thread_struct { > struct task_struct; > struct mm_struct; > > -/* Free all resources held by a thread. */ > -#define release_thread(thread) do { } while(0) > - > extern unsigned long __get_wchan(struct task_struct *p); > > #define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc) > diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h > index 81cab4b01edc..d6c48163c6de 100644 > --- a/include/linux/sched/task.h > +++ b/include/linux/sched/task.h > @@ -127,6 +127,9 @@ static inline void put_task_struct_many(struct task_struct *t, int nr) > > void put_task_struct_rcu_user(struct task_struct *task); > > +/* Free all architecture-specific resources held by a thread. */ > +void release_thread(struct task_struct *dead_task); > + > #ifdef CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT > extern int arch_task_struct_size __read_mostly; > #else > diff --git a/kernel/exit.c b/kernel/exit.c > index 80376b4ac763..30cabf933fed 100644 > --- a/kernel/exit.c > +++ b/kernel/exit.c > @@ -183,6 +183,10 @@ void put_task_struct_rcu_user(struct task_struct *task) > call_rcu(&task->rcu, delayed_put_task_struct); > } > > +void __weak release_thread(struct task_struct *dead_task) > +{ > +} > + > void release_task(struct task_struct *p) > { > struct task_struct *leader; > -- > 2.35.3 >
Hi Kefeng, On Fri, Aug 19, 2022 at 3:39 AM Kefeng Wang <wangkefeng.wang@huawei.com> wrote: > Only x86 has own release_thread(), introduce a new weak > release_thread() function to clean empty definitions in > other ARCHs. > > Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> > arch/m68k/include/asm/processor.h | 5 ----- Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> > --- a/kernel/exit.c > +++ b/kernel/exit.c > @@ -183,6 +183,10 @@ void put_task_struct_rcu_user(struct task_struct *task) > call_rcu(&task->rcu, delayed_put_task_struct); > } > > +void __weak release_thread(struct task_struct *dead_task) > +{ > +} As the default implementation is empty, it might be better to keep this as a static inline function, protected by #ifndef release_thread, and let x86 #define release_thread. > + > void release_task(struct task_struct *p) > { > struct task_struct *leader; Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
On Fri, Aug 19, 2022 at 09:44:06AM +0800, Kefeng Wang wrote: > Only x86 has own release_thread(), introduce a new weak > release_thread() function to clean empty definitions in > other ARCHs. > > Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> ... > arch/arm/include/asm/processor.h | 3 --- > arch/arm/kernel/process.c | 4 ---- Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Thanks!
> -----Original Message----- > From: Kefeng Wang <wangkefeng.wang@huawei.com> ... > Only x86 has own release_thread(), introduce a new weak > release_thread() function to clean empty definitions in > other ARCHs. > > Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> > --- Acked-by: Brian Cain <bcain@quicinc.com>
On Fri, Aug 19, 2022 at 09:44:06AM +0800, Kefeng Wang wrote: > Only x86 has own release_thread(), introduce a new weak > release_thread() function to clean empty definitions in > other ARCHs. > > Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> [...] > arch/arm64/include/asm/processor.h | 3 --- > arch/arm64/kernel/process.c | 4 ---- Acked-by: Catalin Marinas <catalin.marinas@arm.com>
For LoongArch parts: Acked-by: Huacai Chen <chenhuacai@kernel.org> On Sun, Aug 21, 2022 at 7:54 PM Catalin Marinas <catalin.marinas@arm.com> wrote: > > On Fri, Aug 19, 2022 at 09:44:06AM +0800, Kefeng Wang wrote: > > Only x86 has own release_thread(), introduce a new weak > > release_thread() function to clean empty definitions in > > other ARCHs. > > > > Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> > [...] > > arch/arm64/include/asm/processor.h | 3 --- > > arch/arm64/kernel/process.c | 4 ---- > > Acked-by: Catalin Marinas <catalin.marinas@arm.com>
On Fri, Aug 19, 2022 at 09:44:06AM +0800, Kefeng Wang wrote: > Only x86 has own release_thread(), introduce a new weak > release_thread() function to clean empty definitions in > other ARCHs. > > Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> > --- > arch/openrisc/include/asm/processor.h | 1 - > arch/openrisc/kernel/process.c | 4 ---- > diff --git a/arch/openrisc/include/asm/processor.h b/arch/openrisc/include/asm/processor.h > index aa1699c18add..ed9efb430afa 100644 > --- a/arch/openrisc/include/asm/processor.h > +++ b/arch/openrisc/include/asm/processor.h > @@ -72,7 +72,6 @@ struct thread_struct { > > > void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp); > -void release_thread(struct task_struct *); > unsigned long __get_wchan(struct task_struct *p); > > #define cpu_relax() barrier() > diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c > index 52dc983ddeba..f94b5ec06786 100644 > --- a/arch/openrisc/kernel/process.c > +++ b/arch/openrisc/kernel/process.c > @@ -125,10 +125,6 @@ void show_regs(struct pt_regs *regs) > show_registers(regs); > } > > -void release_thread(struct task_struct *dead_task) > -{ > -} > - > /* > * Copy the thread-specific (arch specific) info from the current > * process to the new one p For OpenRISC bits. Acked-by: Stafford Horne <shorne@gmail.com>
diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h index 43e234c518b1..714abe494e5f 100644 --- a/arch/alpha/include/asm/processor.h +++ b/arch/alpha/include/asm/processor.h @@ -36,8 +36,6 @@ extern void start_thread(struct pt_regs *, unsigned long, unsigned long); /* Free all resources held by a thread. */ struct task_struct; -extern void release_thread(struct task_struct *); - unsigned long __get_wchan(struct task_struct *p); #define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc) diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c index e2e25f8b5e76..dbf1bc5e2ad2 100644 --- a/arch/alpha/kernel/process.c +++ b/arch/alpha/kernel/process.c @@ -225,11 +225,6 @@ flush_thread(void) current_thread_info()->pcb.unique = 0; } -void -release_thread(struct task_struct *dead_task) -{ -} - /* * Copy architecture-specific thread state */ diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h index 54db9d7bb562..fb844fce1ab6 100644 --- a/arch/arc/include/asm/processor.h +++ b/arch/arc/include/asm/processor.h @@ -43,9 +43,6 @@ struct task_struct; #define task_pt_regs(p) \ ((struct pt_regs *)(THREAD_SIZE + (void *)task_stack_page(p)) - 1) -/* Free all resources held by a thread */ -#define release_thread(thread) do { } while (0) - /* * A lot of busy-wait loops in SMP are based off of non-volatile data otherwise * get optimised away by gcc diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h index bdc35c0e8dfb..326864f79d18 100644 --- a/arch/arm/include/asm/processor.h +++ b/arch/arm/include/asm/processor.h @@ -81,9 +81,6 @@ static inline void arch_thread_struct_whitelist(unsigned long *offset, /* Forward declaration, a strange C thing */ struct task_struct; -/* Free all resources held by a thread. */ -extern void release_thread(struct task_struct *); - unsigned long __get_wchan(struct task_struct *p); #define task_pt_regs(p) \ diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index 3d9cace63884..712d3e6d9be9 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -232,10 +232,6 @@ void flush_thread(void) thread_notify(THREAD_NOTIFY_FLUSH, thread); } -void release_thread(struct task_struct *dead_task) -{ -} - asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); int copy_thread(struct task_struct *p, const struct kernel_clone_args *args) diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index 86eb0bfe3b38..4cfb4cd1d475 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -323,9 +323,6 @@ static inline bool is_ttbr1_addr(unsigned long addr) /* Forward declaration, a strange C thing */ struct task_struct; -/* Free all resources held by a thread. */ -extern void release_thread(struct task_struct *); - unsigned long __get_wchan(struct task_struct *p); void update_sctlr_el1(u64 sctlr); diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 92bcc1768f0b..9015f49c206e 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -279,10 +279,6 @@ void flush_thread(void) flush_tagged_addr_state(); } -void release_thread(struct task_struct *dead_task) -{ -} - void arch_release_task_struct(struct task_struct *tsk) { fpsimd_release_task(tsk); diff --git a/arch/csky/include/asm/processor.h b/arch/csky/include/asm/processor.h index 9638206bc44f..63ad71fab30d 100644 --- a/arch/csky/include/asm/processor.h +++ b/arch/csky/include/asm/processor.h @@ -69,11 +69,6 @@ do { \ /* Forward declaration, a strange C thing */ struct task_struct; -/* Free all resources held by a thread. */ -static inline void release_thread(struct task_struct *dead_task) -{ -} - /* Prepare to copy thread state - unlazy all lazy status */ #define prepare_to_copy(tsk) do { } while (0) diff --git a/arch/hexagon/include/asm/processor.h b/arch/hexagon/include/asm/processor.h index 615f7e49968e..0cd39c2cdf8f 100644 --- a/arch/hexagon/include/asm/processor.h +++ b/arch/hexagon/include/asm/processor.h @@ -60,10 +60,6 @@ struct thread_struct { #define KSTK_EIP(tsk) (pt_elr(task_pt_regs(tsk))) #define KSTK_ESP(tsk) (pt_psp(task_pt_regs(tsk))) -/* Free all resources held by a thread; defined in process.c */ -extern void release_thread(struct task_struct *dead_task); - -/* Get wait channel for task P. */ extern unsigned long __get_wchan(struct task_struct *p); /* The following stuff is pretty HEXAGON specific. */ diff --git a/arch/hexagon/kernel/process.c b/arch/hexagon/kernel/process.c index f0552f98a7ba..e15eeaebd785 100644 --- a/arch/hexagon/kernel/process.c +++ b/arch/hexagon/kernel/process.c @@ -112,13 +112,6 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args) return 0; } -/* - * Release any architecture-specific resources locked by thread - */ -void release_thread(struct task_struct *dead_task) -{ -} - /* * Some archs flush debug and FPU info here */ diff --git a/arch/ia64/include/asm/processor.h b/arch/ia64/include/asm/processor.h index 757c2f6d8d4b..d1978e004054 100644 --- a/arch/ia64/include/asm/processor.h +++ b/arch/ia64/include/asm/processor.h @@ -318,13 +318,6 @@ struct thread_struct { struct mm_struct; struct task_struct; -/* - * Free all resources held by a thread. This is called after the - * parent of DEAD_TASK has collected the exit status of the task via - * wait(). - */ -#define release_thread(dead_task) - /* Get wait channel for task P. */ extern unsigned long __get_wchan (struct task_struct *p); diff --git a/arch/loongarch/include/asm/processor.h b/arch/loongarch/include/asm/processor.h index 1c4b4308378d..6954dc5d24e9 100644 --- a/arch/loongarch/include/asm/processor.h +++ b/arch/loongarch/include/asm/processor.h @@ -176,9 +176,6 @@ struct thread_struct { struct task_struct; -/* Free all resources held by a thread. */ -#define release_thread(thread) do { } while (0) - enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_HALT, IDLE_NOMWAIT, IDLE_POLL}; extern unsigned long boot_option_idle_override; diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h index d86b4009880b..7a2da780830b 100644 --- a/arch/m68k/include/asm/processor.h +++ b/arch/m68k/include/asm/processor.h @@ -145,11 +145,6 @@ static inline void start_thread(struct pt_regs * regs, unsigned long pc, /* Forward declaration, a strange C thing */ struct task_struct; -/* Free all resources held by a thread. */ -static inline void release_thread(struct task_struct *dead_task) -{ -} - unsigned long __get_wchan(struct task_struct *p); void show_registers(struct pt_regs *regs); diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h index 7e9e92670df3..4e193c7550df 100644 --- a/arch/microblaze/include/asm/processor.h +++ b/arch/microblaze/include/asm/processor.h @@ -63,11 +63,6 @@ struct thread_struct { .pgdir = swapper_pg_dir, \ } -/* Free all resources held by a thread. */ -static inline void release_thread(struct task_struct *dead_task) -{ -} - unsigned long __get_wchan(struct task_struct *p); /* The size allocated for kernel stacks. This _must_ be a power of two! */ diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h index 4bb24579d12e..3fde1ff72bd1 100644 --- a/arch/mips/include/asm/processor.h +++ b/arch/mips/include/asm/processor.h @@ -344,9 +344,6 @@ struct thread_struct { struct task_struct; -/* Free all resources held by a thread. */ -#define release_thread(thread) do { } while(0) - /* * Do necessary setup to start up a newly executed thread. */ diff --git a/arch/nios2/include/asm/processor.h b/arch/nios2/include/asm/processor.h index b8125dfbcad2..8916d93d5c2d 100644 --- a/arch/nios2/include/asm/processor.h +++ b/arch/nios2/include/asm/processor.h @@ -64,11 +64,6 @@ extern void start_thread(struct pt_regs *regs, unsigned long pc, struct task_struct; -/* Free all resources held by a thread. */ -static inline void release_thread(struct task_struct *dead_task) -{ -} - extern unsigned long __get_wchan(struct task_struct *p); #define task_pt_regs(p) \ diff --git a/arch/openrisc/include/asm/processor.h b/arch/openrisc/include/asm/processor.h index aa1699c18add..ed9efb430afa 100644 --- a/arch/openrisc/include/asm/processor.h +++ b/arch/openrisc/include/asm/processor.h @@ -72,7 +72,6 @@ struct thread_struct { void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp); -void release_thread(struct task_struct *); unsigned long __get_wchan(struct task_struct *p); #define cpu_relax() barrier() diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c index 52dc983ddeba..f94b5ec06786 100644 --- a/arch/openrisc/kernel/process.c +++ b/arch/openrisc/kernel/process.c @@ -125,10 +125,6 @@ void show_regs(struct pt_regs *regs) show_registers(regs); } -void release_thread(struct task_struct *dead_task) -{ -} - /* * Copy the thread-specific (arch specific) info from the current * process to the new one p diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h index 4621ceb51314..a608970b249a 100644 --- a/arch/parisc/include/asm/processor.h +++ b/arch/parisc/include/asm/processor.h @@ -266,9 +266,6 @@ on downward growing arches, it looks like this: struct mm_struct; -/* Free all resources held by a thread. */ -extern void release_thread(struct task_struct *); - extern unsigned long __get_wchan(struct task_struct *p); #define KSTK_EIP(tsk) ((tsk)->thread.regs.iaoq[0]) diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c index 7c37e09c92da..3db0e97e6c06 100644 --- a/arch/parisc/kernel/process.c +++ b/arch/parisc/kernel/process.c @@ -146,10 +146,6 @@ void flush_thread(void) */ } -void release_thread(struct task_struct *dead_task) -{ -} - /* * Idle thread support * diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index fdfaae194ddd..92e332415d02 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h @@ -75,7 +75,6 @@ extern int _chrp_type; struct task_struct; void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp); -void release_thread(struct task_struct *); #define TS_FPR(i) fp_state.fpr[i][TS_FPROFFSET] #define TS_CKFPR(i) ckfp_state.fpr[i][TS_FPROFFSET] diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 0fbda89cd1bb..991cda25b9a9 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -1655,11 +1655,6 @@ EXPORT_SYMBOL_GPL(set_thread_tidr); #endif /* CONFIG_PPC64 */ -void -release_thread(struct task_struct *t) -{ -} - /* * this gets called so that we can store coprocessor state into memory and * copy the current task into the new thread. diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h index 19eedd4af4cd..94a0590c6971 100644 --- a/arch/riscv/include/asm/processor.h +++ b/arch/riscv/include/asm/processor.h @@ -65,11 +65,6 @@ static inline void arch_thread_struct_whitelist(unsigned long *offset, extern void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp); -/* Free all resources held by a thread. */ -static inline void release_thread(struct task_struct *dead_task) -{ -} - extern unsigned long __get_wchan(struct task_struct *p); diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index bd66f8e34949..c52fe651eeba 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -186,9 +186,6 @@ struct pt_regs; void show_registers(struct pt_regs *regs); void show_cacheinfo(struct seq_file *m); -/* Free all resources held by a thread. */ -static inline void release_thread(struct task_struct *tsk) { } - /* Free guarded storage control block */ void guarded_storage_release(struct task_struct *tsk); void gs_load_bc_cb(struct pt_regs *regs); diff --git a/arch/sh/include/asm/processor_32.h b/arch/sh/include/asm/processor_32.h index 45240ec6b85a..27aebf1e75a2 100644 --- a/arch/sh/include/asm/processor_32.h +++ b/arch/sh/include/asm/processor_32.h @@ -127,9 +127,6 @@ struct task_struct; extern void start_thread(struct pt_regs *regs, unsigned long new_pc, unsigned long new_sp); -/* Free all resources held by a thread. */ -extern void release_thread(struct task_struct *); - /* * FPU lazy state save handling. */ diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c index a808843375e7..92b6649d4929 100644 --- a/arch/sh/kernel/process_32.c +++ b/arch/sh/kernel/process_32.c @@ -84,11 +84,6 @@ void flush_thread(void) #endif } -void release_thread(struct task_struct *dead_task) -{ - /* do nothing */ -} - asmlinkage void ret_from_fork(void); asmlinkage void ret_from_kernel_thread(void); diff --git a/arch/sparc/include/asm/processor_32.h b/arch/sparc/include/asm/processor_32.h index b26c35336b51..ba8b70ffec08 100644 --- a/arch/sparc/include/asm/processor_32.h +++ b/arch/sparc/include/asm/processor_32.h @@ -80,9 +80,6 @@ static inline void start_thread(struct pt_regs * regs, unsigned long pc, : "memory"); } -/* Free all resources held by a thread. */ -#define release_thread(tsk) do { } while(0) - unsigned long __get_wchan(struct task_struct *); #define task_pt_regs(tsk) ((tsk)->thread.kregs) diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/processor_64.h index 89850dff6b03..2667f35d5ea5 100644 --- a/arch/sparc/include/asm/processor_64.h +++ b/arch/sparc/include/asm/processor_64.h @@ -176,9 +176,6 @@ do { \ regs->tstate &= ~TSTATE_PEF; \ } while (0) -/* Free all resources held by a thread. */ -#define release_thread(tsk) do { } while (0) - unsigned long __get_wchan(struct task_struct *task); #define task_pt_regs(tsk) (task_thread_info(tsk)->kregs) diff --git a/arch/um/include/asm/processor-generic.h b/arch/um/include/asm/processor-generic.h index d0fc1862da95..bb5f06480da9 100644 --- a/arch/um/include/asm/processor-generic.h +++ b/arch/um/include/asm/processor-generic.h @@ -55,10 +55,6 @@ struct thread_struct { .request = { 0 } \ } -static inline void release_thread(struct task_struct *task) -{ -} - /* * User space process size: 3GB (default). */ diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 356308c73951..67c9d73b31fa 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -587,9 +587,6 @@ static inline void load_sp0(unsigned long sp0) #endif /* CONFIG_PARAVIRT_XXL */ -/* Free all resources held by a thread. */ -extern void release_thread(struct task_struct *); - unsigned long __get_wchan(struct task_struct *p); /* diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h index 76bc63127c66..5abde43c570c 100644 --- a/arch/xtensa/include/asm/processor.h +++ b/arch/xtensa/include/asm/processor.h @@ -221,9 +221,6 @@ struct thread_struct { struct task_struct; struct mm_struct; -/* Free all resources held by a thread. */ -#define release_thread(thread) do { } while(0) - extern unsigned long __get_wchan(struct task_struct *p); #define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc) diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h index 81cab4b01edc..d6c48163c6de 100644 --- a/include/linux/sched/task.h +++ b/include/linux/sched/task.h @@ -127,6 +127,9 @@ static inline void put_task_struct_many(struct task_struct *t, int nr) void put_task_struct_rcu_user(struct task_struct *task); +/* Free all architecture-specific resources held by a thread. */ +void release_thread(struct task_struct *dead_task); + #ifdef CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT extern int arch_task_struct_size __read_mostly; #else diff --git a/kernel/exit.c b/kernel/exit.c index 80376b4ac763..30cabf933fed 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -183,6 +183,10 @@ void put_task_struct_rcu_user(struct task_struct *task) call_rcu(&task->rcu, delayed_put_task_struct); } +void __weak release_thread(struct task_struct *dead_task) +{ +} + void release_task(struct task_struct *p) { struct task_struct *leader;
Only x86 has own release_thread(), introduce a new weak release_thread() function to clean empty definitions in other ARCHs. Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> --- arch/alpha/include/asm/processor.h | 2 -- arch/alpha/kernel/process.c | 5 ----- arch/arc/include/asm/processor.h | 3 --- arch/arm/include/asm/processor.h | 3 --- arch/arm/kernel/process.c | 4 ---- arch/arm64/include/asm/processor.h | 3 --- arch/arm64/kernel/process.c | 4 ---- arch/csky/include/asm/processor.h | 5 ----- arch/hexagon/include/asm/processor.h | 4 ---- arch/hexagon/kernel/process.c | 7 ------- arch/ia64/include/asm/processor.h | 7 ------- arch/loongarch/include/asm/processor.h | 3 --- arch/m68k/include/asm/processor.h | 5 ----- arch/microblaze/include/asm/processor.h | 5 ----- arch/mips/include/asm/processor.h | 3 --- arch/nios2/include/asm/processor.h | 5 ----- arch/openrisc/include/asm/processor.h | 1 - arch/openrisc/kernel/process.c | 4 ---- arch/parisc/include/asm/processor.h | 3 --- arch/parisc/kernel/process.c | 4 ---- arch/powerpc/include/asm/processor.h | 1 - arch/powerpc/kernel/process.c | 5 ----- arch/riscv/include/asm/processor.h | 5 ----- arch/s390/include/asm/processor.h | 3 --- arch/sh/include/asm/processor_32.h | 3 --- arch/sh/kernel/process_32.c | 5 ----- arch/sparc/include/asm/processor_32.h | 3 --- arch/sparc/include/asm/processor_64.h | 3 --- arch/um/include/asm/processor-generic.h | 4 ---- arch/x86/include/asm/processor.h | 3 --- arch/xtensa/include/asm/processor.h | 3 --- include/linux/sched/task.h | 3 +++ kernel/exit.c | 4 ++++ 33 files changed, 7 insertions(+), 118 deletions(-)