| Message ID | ad7ee70bd00c0de4b6dad48c91281929e98ef95c.1702911455.git.nicola.vetrini@bugseng.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [XEN,v2] xen: move declaration of first_valid_mfn to xen/numa.h | expand |
On Mon, 18 Dec 2023, Nicola Vetrini wrote: > Such declaration is moved in order to provide it for Arm and PPC, > whilst not violating MISRA C:2012 Rule 8.4 in common/page_alloc.c: > "A compatible declaration shall be visible when an object or > function with external linkage is defined". > > Signed-off-by: Julien Grall <julien@xen.org> > Signed-off-by: Nicola Vetrini <nicola.vetrini@bugseng.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> > --- > Changes in v2: > This patch is a rework of a previous one appeared in this series [1], of which > patches 1 and 2 have been committed already. > > The updated patch was provided by Julien in this thread [2]. I added the commit > message and the rest of the information. > > [1] https://lore.kernel.org/xen-devel/cover.1702285639.git.nicola.vetrini@bugseng.com/T/#mee6def855787d932fe2f10d5648d437dcb6f046c > [2] https://lore.kernel.org/xen-devel/cover.1702285639.git.nicola.vetrini@bugseng.com/T/#m3c5b141b806530b5920bb5e9dd53631195560317 > --- > xen/arch/arm/include/asm/numa.h | 6 ------ > xen/arch/ppc/include/asm/numa.h | 6 ------ > xen/common/page_alloc.c | 6 ++++-- > xen/include/xen/numa.h | 2 ++ > 4 files changed, 6 insertions(+), 14 deletions(-) > > diff --git a/xen/arch/arm/include/asm/numa.h b/xen/arch/arm/include/asm/numa.h > index e2bee2bd8223..a2c1da4a82f7 100644 > --- a/xen/arch/arm/include/asm/numa.h > +++ b/xen/arch/arm/include/asm/numa.h > @@ -11,12 +11,6 @@ typedef u8 nodeid_t; > #define cpu_to_node(cpu) 0 > #define node_to_cpumask(node) (cpu_online_map) > > -/* > - * TODO: make first_valid_mfn static when NUMA is supported on Arm, this > - * is required because the dummy helpers are using it. > - */ > -extern mfn_t first_valid_mfn; > - > /* XXX: implement NUMA support */ > #define node_spanned_pages(nid) (max_page - mfn_x(first_valid_mfn)) > #define node_start_pfn(nid) (mfn_x(first_valid_mfn)) > diff --git a/xen/arch/ppc/include/asm/numa.h b/xen/arch/ppc/include/asm/numa.h > index 7fdf66c3da74..204180ad5b98 100644 > --- a/xen/arch/ppc/include/asm/numa.h > +++ b/xen/arch/ppc/include/asm/numa.h > @@ -10,12 +10,6 @@ typedef uint8_t nodeid_t; > #define cpu_to_node(cpu) 0 > #define node_to_cpumask(node) (cpu_online_map) > > -/* > - * TODO: make first_valid_mfn static when NUMA is supported on PPC, this > - * is required because the dummy helpers are using it. > - */ > -extern mfn_t first_valid_mfn; > - > /* XXX: implement NUMA support */ > #define node_spanned_pages(nid) (max_page - mfn_x(first_valid_mfn)) > #define node_start_pfn(nid) (mfn_x(first_valid_mfn)) > diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c > index 9b5df74fddab..d874525916ea 100644 > --- a/xen/common/page_alloc.c > +++ b/xen/common/page_alloc.c > @@ -255,8 +255,10 @@ static PAGE_LIST_HEAD(page_broken_list); > */ > > /* > - * first_valid_mfn is exported because it is use in ARM specific NUMA > - * helpers. See comment in arch/arm/include/asm/numa.h. > + * first_valid_mfn is exported because it is used when !CONFIG_NUMA. > + * > + * TODO: Consider if we can conditionally export first_valid_mfn based > + * on whether NUMA is selected. > */ > mfn_t first_valid_mfn = INVALID_MFN_INITIALIZER; > > diff --git a/xen/include/xen/numa.h b/xen/include/xen/numa.h > index 287e81ff6666..a10d4b1778a0 100644 > --- a/xen/include/xen/numa.h > +++ b/xen/include/xen/numa.h > @@ -108,6 +108,8 @@ extern void numa_set_processor_nodes_parsed(nodeid_t node); > > #else > > +extern mfn_t first_valid_mfn; > + > static inline nodeid_t mfn_to_nid(mfn_t mfn) > { > return 0; > -- > 2.34.1 >
On 19.12.2023 02:48, Stefano Stabellini wrote: > On Mon, 18 Dec 2023, Nicola Vetrini wrote: >> Such declaration is moved in order to provide it for Arm and PPC, >> whilst not violating MISRA C:2012 Rule 8.4 in common/page_alloc.c: >> "A compatible declaration shall be visible when an object or >> function with external linkage is defined". >> >> Signed-off-by: Julien Grall <julien@xen.org> >> Signed-off-by: Nicola Vetrini <nicola.vetrini@bugseng.com> > > Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> I was about to submit my replacement, just to find that this was committed during my night. I have to admit that I absolutely do not understand the need for rushing here; I thought I said quite clearly that I will come forward with a patch dealing with two issues in one go. Now I need to go and re-base my change, because all of what this patch touches is also touched by my change, as the 2nd issue (the pointless presence of asm/numa.h and the need for RISC-V to introduce a 3rd instance if nothing is done up front) is still there. Jan
On Wed, 20 Dec 2023, Jan Beulich wrote: > On 19.12.2023 02:48, Stefano Stabellini wrote: > > On Mon, 18 Dec 2023, Nicola Vetrini wrote: > >> Such declaration is moved in order to provide it for Arm and PPC, > >> whilst not violating MISRA C:2012 Rule 8.4 in common/page_alloc.c: > >> "A compatible declaration shall be visible when an object or > >> function with external linkage is defined". > >> > >> Signed-off-by: Julien Grall <julien@xen.org> > >> Signed-off-by: Nicola Vetrini <nicola.vetrini@bugseng.com> > > > > Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> > > I was about to submit my replacement, just to find that this was committed > during my night. I have to admit that I absolutely do not understand the > need for rushing here; I thought I said quite clearly that I will come > forward with a patch dealing with two issues in one go. Now I need to go > and re-base my change, because all of what this patch touches is also > touched by my change, as the 2nd issue (the pointless presence of > asm/numa.h and the need for RISC-V to introduce a 3rd instance if nothing > is done up front) is still there. Hi Jan, Sorry about that. As you might have noticed I typically wait at least 1-2 days but this time I wasn't sure I would be able to come back online before the Holidays and I was trying to clean things up. I apologize.
diff --git a/xen/arch/arm/include/asm/numa.h b/xen/arch/arm/include/asm/numa.h index e2bee2bd8223..a2c1da4a82f7 100644 --- a/xen/arch/arm/include/asm/numa.h +++ b/xen/arch/arm/include/asm/numa.h @@ -11,12 +11,6 @@ typedef u8 nodeid_t; #define cpu_to_node(cpu) 0 #define node_to_cpumask(node) (cpu_online_map) -/* - * TODO: make first_valid_mfn static when NUMA is supported on Arm, this - * is required because the dummy helpers are using it. - */ -extern mfn_t first_valid_mfn; - /* XXX: implement NUMA support */ #define node_spanned_pages(nid) (max_page - mfn_x(first_valid_mfn)) #define node_start_pfn(nid) (mfn_x(first_valid_mfn)) diff --git a/xen/arch/ppc/include/asm/numa.h b/xen/arch/ppc/include/asm/numa.h index 7fdf66c3da74..204180ad5b98 100644 --- a/xen/arch/ppc/include/asm/numa.h +++ b/xen/arch/ppc/include/asm/numa.h @@ -10,12 +10,6 @@ typedef uint8_t nodeid_t; #define cpu_to_node(cpu) 0 #define node_to_cpumask(node) (cpu_online_map) -/* - * TODO: make first_valid_mfn static when NUMA is supported on PPC, this - * is required because the dummy helpers are using it. - */ -extern mfn_t first_valid_mfn; - /* XXX: implement NUMA support */ #define node_spanned_pages(nid) (max_page - mfn_x(first_valid_mfn)) #define node_start_pfn(nid) (mfn_x(first_valid_mfn)) diff --git a/xen/common/page_alloc.c b/xen/common/page_alloc.c index 9b5df74fddab..d874525916ea 100644 --- a/xen/common/page_alloc.c +++ b/xen/common/page_alloc.c @@ -255,8 +255,10 @@ static PAGE_LIST_HEAD(page_broken_list); */ /* - * first_valid_mfn is exported because it is use in ARM specific NUMA - * helpers. See comment in arch/arm/include/asm/numa.h. + * first_valid_mfn is exported because it is used when !CONFIG_NUMA. + * + * TODO: Consider if we can conditionally export first_valid_mfn based + * on whether NUMA is selected. */ mfn_t first_valid_mfn = INVALID_MFN_INITIALIZER; diff --git a/xen/include/xen/numa.h b/xen/include/xen/numa.h index 287e81ff6666..a10d4b1778a0 100644 --- a/xen/include/xen/numa.h +++ b/xen/include/xen/numa.h @@ -108,6 +108,8 @@ extern void numa_set_processor_nodes_parsed(nodeid_t node); #else +extern mfn_t first_valid_mfn; + static inline nodeid_t mfn_to_nid(mfn_t mfn) { return 0;