diff mbox series

[v5,02/13] module: Simple refactor in preparation for split

Message ID 20220209170358.3266629-3-atomlin@redhat.com (mailing list archive)
State Superseded
Headers show
Series module: core code clean up | expand

Commit Message

Aaron Tomlin Feb. 9, 2022, 5:03 p.m. UTC 
No functional change.

This patch makes it possible to move non-essential code
out of core module code.

Signed-off-by: Aaron Tomlin <atomlin@redhat.com>
---
 kernel/module/internal.h | 22 ++++++++++++++++++++++
 kernel/module/main.c     | 23 ++---------------------
 2 files changed, 24 insertions(+), 21 deletions(-)

Comments

Christophe Leroy Feb. 10, 2022, 11:18 a.m. UTC | #1 
Le 09/02/2022 à 18:03, Aaron Tomlin a écrit :
> No functional change.
> 
> This patch makes it possible to move non-essential code
> out of core module code.
> 
> Signed-off-by: Aaron Tomlin <atomlin@redhat.com>
> ---
>   kernel/module/internal.h | 22 ++++++++++++++++++++++
>   kernel/module/main.c     | 23 ++---------------------
>   2 files changed, 24 insertions(+), 21 deletions(-)
> 
> diff --git a/kernel/module/internal.h b/kernel/module/internal.h
> index c49896368f7f..1a4b33ce9f5f 100644
> --- a/kernel/module/internal.h
> +++ b/kernel/module/internal.h
> @@ -7,6 +7,28 @@
>   
>   #include <linux/elf.h>
>   #include <asm/module.h>
> +#include <linux/mutex.h>
> +
> +#ifndef ARCH_SHF_SMALL
> +#define ARCH_SHF_SMALL 0
> +#endif
> +
> +/* If this is set, the section belongs in the init part of the module */
> +#define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
> +/* Maximum number of characters written by module_flags() */
> +#define MODULE_FLAGS_BUF_SIZE (TAINT_FLAGS_COUNT + 4)
> +#define MODULE_SECT_READ_SIZE (3 /* "0x", "\n" */ + (BITS_PER_LONG / 4))

This is used only in sysfs.c, why move it to internal.h ?


> +
> +extern struct mutex module_mutex;
> +extern struct list_head modules;
> +
> +/* Provided by the linker */
> +extern const struct kernel_symbol __start___ksymtab[];
> +extern const struct kernel_symbol __stop___ksymtab[];
> +extern const struct kernel_symbol __start___ksymtab_gpl[];
> +extern const struct kernel_symbol __stop___ksymtab_gpl[];
> +extern const s32 __start___kcrctab[];
> +extern const s32 __start___kcrctab_gpl[];
>   
>   struct load_info {
>   	const char *name;
> diff --git a/kernel/module/main.c b/kernel/module/main.c
> index 34a2b0cf3c3e..750e3ad28679 100644
> --- a/kernel/module/main.c
> +++ b/kernel/module/main.c
> @@ -63,10 +63,6 @@
>   #define CREATE_TRACE_POINTS
>   #include <trace/events/module.h>
>   
> -#ifndef ARCH_SHF_SMALL
> -#define ARCH_SHF_SMALL 0
> -#endif
> -
>   /*
>    * Modules' sections will be aligned on page boundaries
>    * to ensure complete separation of code and data, but
> @@ -78,9 +74,6 @@
>   # define debug_align(X) (X)
>   #endif
>   
> -/* If this is set, the section belongs in the init part of the module */
> -#define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
> -
>   /*
>    * Mutex protects:
>    * 1) List of modules (also safely readable with preempt_disable),
> @@ -88,8 +81,8 @@
>    * 3) module_addr_min/module_addr_max.
>    * (delete and add uses RCU list operations).
>    */
> -static DEFINE_MUTEX(module_mutex);
> -static LIST_HEAD(modules);
> +DEFINE_MUTEX(module_mutex);
> +LIST_HEAD(modules);
>   
>   /* Work queue for freeing init sections in success case */
>   static void do_free_init(struct work_struct *w);
> @@ -408,14 +401,6 @@ static __maybe_unused void *any_section_objs(const struct load_info *info,
>   	return (void *)info->sechdrs[sec].sh_addr;
>   }
>   
> -/* Provided by the linker */
> -extern const struct kernel_symbol __start___ksymtab[];
> -extern const struct kernel_symbol __stop___ksymtab[];
> -extern const struct kernel_symbol __start___ksymtab_gpl[];
> -extern const struct kernel_symbol __stop___ksymtab_gpl[];
> -extern const s32 __start___kcrctab[];
> -extern const s32 __start___kcrctab_gpl[];
> -
>   #ifndef CONFIG_MODVERSIONS
>   #define symversion(base, idx) NULL
>   #else
> @@ -1490,7 +1475,6 @@ struct module_sect_attrs {
>   	struct module_sect_attr attrs[];
>   };
>   
> -#define MODULE_SECT_READ_SIZE (3 /* "0x", "\n" */ + (BITS_PER_LONG / 4))

This is used only in sysfs.c, why move it to internal.h ?

>   static ssize_t module_sect_read(struct file *file, struct kobject *kobj,
>   				struct bin_attribute *battr,
>   				char *buf, loff_t pos, size_t count)
> @@ -4542,9 +4526,6 @@ static void cfi_cleanup(struct module *mod)
>   #endif
>   }
>   
> -/* Maximum number of characters written by module_flags() */
> -#define MODULE_FLAGS_BUF_SIZE (TAINT_FLAGS_COUNT + 4)
> -
>   /* Keep in sync with MODULE_FLAGS_BUF_SIZE !!! */
>   static char *module_flags(struct module *mod, char *buf)
>   {
Aaron Tomlin Feb. 10, 2022, 4:26 p.m. UTC | #2 
On Thu 2022-02-10 11:18 +0000, Christophe Leroy wrote:
> > +#define MODULE_SECT_READ_SIZE (3 /* "0x", "\n" */ + (BITS_PER_LONG / 4))
>
> This is used only in sysfs.c, why move it to internal.h ?

Agreed. Since use is exclusive to kernel/module/sysfs.c it should be moved.

Kind regards,
diff mbox series

Patch

diff --git a/kernel/module/internal.h b/kernel/module/internal.h
index c49896368f7f..1a4b33ce9f5f 100644
--- a/kernel/module/internal.h
+++ b/kernel/module/internal.h
@@ -7,6 +7,28 @@ 
 
 #include <linux/elf.h>
 #include <asm/module.h>
+#include <linux/mutex.h>
+
+#ifndef ARCH_SHF_SMALL
+#define ARCH_SHF_SMALL 0
+#endif
+
+/* If this is set, the section belongs in the init part of the module */
+#define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
+/* Maximum number of characters written by module_flags() */
+#define MODULE_FLAGS_BUF_SIZE (TAINT_FLAGS_COUNT + 4)
+#define MODULE_SECT_READ_SIZE (3 /* "0x", "\n" */ + (BITS_PER_LONG / 4))
+
+extern struct mutex module_mutex;
+extern struct list_head modules;
+
+/* Provided by the linker */
+extern const struct kernel_symbol __start___ksymtab[];
+extern const struct kernel_symbol __stop___ksymtab[];
+extern const struct kernel_symbol __start___ksymtab_gpl[];
+extern const struct kernel_symbol __stop___ksymtab_gpl[];
+extern const s32 __start___kcrctab[];
+extern const s32 __start___kcrctab_gpl[];
 
 struct load_info {
 	const char *name;
diff --git a/kernel/module/main.c b/kernel/module/main.c
index 34a2b0cf3c3e..750e3ad28679 100644
--- a/kernel/module/main.c
+++ b/kernel/module/main.c
@@ -63,10 +63,6 @@ 
 #define CREATE_TRACE_POINTS
 #include <trace/events/module.h>
 
-#ifndef ARCH_SHF_SMALL
-#define ARCH_SHF_SMALL 0
-#endif
-
 /*
  * Modules' sections will be aligned on page boundaries
  * to ensure complete separation of code and data, but
@@ -78,9 +74,6 @@ 
 # define debug_align(X) (X)
 #endif
 
-/* If this is set, the section belongs in the init part of the module */
-#define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
-
 /*
  * Mutex protects:
  * 1) List of modules (also safely readable with preempt_disable),
@@ -88,8 +81,8 @@ 
  * 3) module_addr_min/module_addr_max.
  * (delete and add uses RCU list operations).
  */
-static DEFINE_MUTEX(module_mutex);
-static LIST_HEAD(modules);
+DEFINE_MUTEX(module_mutex);
+LIST_HEAD(modules);
 
 /* Work queue for freeing init sections in success case */
 static void do_free_init(struct work_struct *w);
@@ -408,14 +401,6 @@  static __maybe_unused void *any_section_objs(const struct load_info *info,
 	return (void *)info->sechdrs[sec].sh_addr;
 }
 
-/* Provided by the linker */
-extern const struct kernel_symbol __start___ksymtab[];
-extern const struct kernel_symbol __stop___ksymtab[];
-extern const struct kernel_symbol __start___ksymtab_gpl[];
-extern const struct kernel_symbol __stop___ksymtab_gpl[];
-extern const s32 __start___kcrctab[];
-extern const s32 __start___kcrctab_gpl[];
-
 #ifndef CONFIG_MODVERSIONS
 #define symversion(base, idx) NULL
 #else
@@ -1490,7 +1475,6 @@  struct module_sect_attrs {
 	struct module_sect_attr attrs[];
 };
 
-#define MODULE_SECT_READ_SIZE (3 /* "0x", "\n" */ + (BITS_PER_LONG / 4))
 static ssize_t module_sect_read(struct file *file, struct kobject *kobj,
 				struct bin_attribute *battr,
 				char *buf, loff_t pos, size_t count)
@@ -4542,9 +4526,6 @@  static void cfi_cleanup(struct module *mod)
 #endif
 }
 
-/* Maximum number of characters written by module_flags() */
-#define MODULE_FLAGS_BUF_SIZE (TAINT_FLAGS_COUNT + 4)
-
 /* Keep in sync with MODULE_FLAGS_BUF_SIZE !!! */
 static char *module_flags(struct module *mod, char *buf)
 {