procfs: consolidate arch_report_meminfo declaration

  From: Arnd Bergmann <arnd@arndb.de>

The arch_report_meminfo() function is provided by four architectures,
with a __weak fallback in procfs itself. On architectures that don't
have a custom version, the __weak version causes a warning because
of the missing prototype.

Remove the architecture specific prototypes and instead add one
in linux/proc_fs.h.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/parisc/include/asm/pgtable.h    | 3 ---
 arch/powerpc/include/asm/pgtable.h   | 3 ---
 arch/s390/include/asm/pgtable.h      | 3 ---
 arch/s390/mm/pageattr.c              | 1 +
 arch/x86/include/asm/pgtable.h       | 1 +
 arch/x86/include/asm/pgtable_types.h | 3 ---
 arch/x86/mm/pat/set_memory.c         | 1 +
 include/linux/proc_fs.h              | 2 ++
 8 files changed, 5 insertions(+), 12 deletions(-)
  

On 5/16/23 12:57, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The arch_report_meminfo() function is provided by four architectures,
> with a __weak fallback in procfs itself. On architectures that don't
> have a custom version, the __weak version causes a warning because
> of the missing prototype.
> 
> Remove the architecture specific prototypes and instead add one
> in linux/proc_fs.h.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  arch/parisc/include/asm/pgtable.h    | 3 ---
>  arch/powerpc/include/asm/pgtable.h   | 3 ---
>  arch/s390/include/asm/pgtable.h      | 3 ---
>  arch/s390/mm/pageattr.c              | 1 +
>  arch/x86/include/asm/pgtable.h       | 1 +
>  arch/x86/include/asm/pgtable_types.h | 3 ---

Looks sane.  Thanks Arnd!

Acked-by: Dave Hansen <dave.hansen@linux.intel.com> # for arch/x86
  

On Tue, 16 May 2023 21:57:29 +0200, Arnd Bergmann wrote:
> The arch_report_meminfo() function is provided by four architectures,
> with a __weak fallback in procfs itself. On architectures that don't
> have a custom version, the __weak version causes a warning because
> of the missing prototype.
> 
> Remove the architecture specific prototypes and instead add one
> in linux/proc_fs.h.
> 
> [...]

Applied to the vfs.misc branch of the vfs/vfs.git tree.
Patches in the vfs.misc branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs.misc

[1/1] procfs: consolidate arch_report_meminfo declaration
      https://git.kernel.org/vfs/vfs/c/edb0469aa6e8
  

On Tue, May 16, 2023 at 09:57:29PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The arch_report_meminfo() function is provided by four architectures,
> with a __weak fallback in procfs itself. On architectures that don't
> have a custom version, the __weak version causes a warning because
> of the missing prototype.
> 
> Remove the architecture specific prototypes and instead add one
> in linux/proc_fs.h.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  arch/parisc/include/asm/pgtable.h    | 3 ---
>  arch/powerpc/include/asm/pgtable.h   | 3 ---
>  arch/s390/include/asm/pgtable.h      | 3 ---
>  arch/s390/mm/pageattr.c              | 1 +
>  arch/x86/include/asm/pgtable.h       | 1 +
>  arch/x86/include/asm/pgtable_types.h | 3 ---
>  arch/x86/mm/pat/set_memory.c         | 1 +
>  include/linux/proc_fs.h              | 2 ++
>  8 files changed, 5 insertions(+), 12 deletions(-)
...
> diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
> index 6822a11c2c8a..c55f3c3365af 100644
> --- a/arch/s390/include/asm/pgtable.h
> +++ b/arch/s390/include/asm/pgtable.h
> @@ -42,9 +42,6 @@ static inline void update_page_count(int level, long count)
>  		atomic_long_add(count, &direct_pages_count[level]);
>  }
>  
> -struct seq_file;
> -void arch_report_meminfo(struct seq_file *m);
> -
>  /*
>   * The S390 doesn't have any external MMU info: the kernel page
>   * tables contain all the necessary information.
> diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c
> index 5ba3bd8a7b12..ca5a418c58a8 100644
> --- a/arch/s390/mm/pageattr.c
> +++ b/arch/s390/mm/pageattr.c
> @@ -4,6 +4,7 @@
>   * Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
>   */
>  #include <linux/hugetlb.h>
> +#include <linux/proc_fs.h>
>  #include <linux/vmalloc.h>
>  #include <linux/mm.h>
>  #include <asm/cacheflush.h>

For s390:

Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
  

On 5/16/23 21:57, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
>
> The arch_report_meminfo() function is provided by four architectures,
> with a __weak fallback in procfs itself. On architectures that don't
> have a custom version, the __weak version causes a warning because
> of the missing prototype.
>
> Remove the architecture specific prototypes and instead add one
> in linux/proc_fs.h.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>   arch/parisc/include/asm/pgtable.h    | 3 ---

Acked-by: Helge Deller <deller@gmx.de> # parisc

Thanks!
Helge


>   arch/powerpc/include/asm/pgtable.h   | 3 ---
>   arch/s390/include/asm/pgtable.h      | 3 ---
>   arch/s390/mm/pageattr.c              | 1 +
>   arch/x86/include/asm/pgtable.h       | 1 +
>   arch/x86/include/asm/pgtable_types.h | 3 ---
>   arch/x86/mm/pat/set_memory.c         | 1 +
>   include/linux/proc_fs.h              | 2 ++
>   8 files changed, 5 insertions(+), 12 deletions(-)
>
> diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
> index e715df5385d6..5656395c95ee 100644
> --- a/arch/parisc/include/asm/pgtable.h
> +++ b/arch/parisc/include/asm/pgtable.h
> @@ -472,9 +472,6 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
>
>   #define pte_same(A,B)	(pte_val(A) == pte_val(B))
>
> -struct seq_file;
> -extern void arch_report_meminfo(struct seq_file *m);
> -
>   #endif /* !__ASSEMBLY__ */
>
>
> diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
> index 9972626ddaf6..6a88bfdaa69b 100644
> --- a/arch/powerpc/include/asm/pgtable.h
> +++ b/arch/powerpc/include/asm/pgtable.h
> @@ -165,9 +165,6 @@ static inline bool is_ioremap_addr(const void *x)
>
>   	return addr >= IOREMAP_BASE && addr < IOREMAP_END;
>   }
> -
> -struct seq_file;
> -void arch_report_meminfo(struct seq_file *m);
>   #endif /* CONFIG_PPC64 */
>
>   #endif /* __ASSEMBLY__ */
> diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
> index 6822a11c2c8a..c55f3c3365af 100644
> --- a/arch/s390/include/asm/pgtable.h
> +++ b/arch/s390/include/asm/pgtable.h
> @@ -42,9 +42,6 @@ static inline void update_page_count(int level, long count)
>   		atomic_long_add(count, &direct_pages_count[level]);
>   }
>
> -struct seq_file;
> -void arch_report_meminfo(struct seq_file *m);
> -
>   /*
>    * The S390 doesn't have any external MMU info: the kernel page
>    * tables contain all the necessary information.
> diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c
> index 5ba3bd8a7b12..ca5a418c58a8 100644
> --- a/arch/s390/mm/pageattr.c
> +++ b/arch/s390/mm/pageattr.c
> @@ -4,6 +4,7 @@
>    * Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
>    */
>   #include <linux/hugetlb.h>
> +#include <linux/proc_fs.h>
>   #include <linux/vmalloc.h>
>   #include <linux/mm.h>
>   #include <asm/cacheflush.h>
> diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
> index 15ae4d6ba476..5700bb337987 100644
> --- a/arch/x86/include/asm/pgtable.h
> +++ b/arch/x86/include/asm/pgtable.h
> @@ -27,6 +27,7 @@
>   extern pgd_t early_top_pgt[PTRS_PER_PGD];
>   bool __init __early_make_pgtable(unsigned long address, pmdval_t pmd);
>
> +struct seq_file;
>   void ptdump_walk_pgd_level(struct seq_file *m, struct mm_struct *mm);
>   void ptdump_walk_pgd_level_debugfs(struct seq_file *m, struct mm_struct *mm,
>   				   bool user);
> diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h
> index 447d4bee25c4..ba3e2554799a 100644
> --- a/arch/x86/include/asm/pgtable_types.h
> +++ b/arch/x86/include/asm/pgtable_types.h
> @@ -513,9 +513,6 @@ extern void native_pagetable_init(void);
>   #define native_pagetable_init        paging_init
>   #endif
>
> -struct seq_file;
> -extern void arch_report_meminfo(struct seq_file *m);
> -
>   enum pg_level {
>   	PG_LEVEL_NONE,
>   	PG_LEVEL_4K,
> diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c
> index 7159cf787613..d1515756e369 100644
> --- a/arch/x86/mm/pat/set_memory.c
> +++ b/arch/x86/mm/pat/set_memory.c
> @@ -9,6 +9,7 @@
>   #include <linux/mm.h>
>   #include <linux/interrupt.h>
>   #include <linux/seq_file.h>
> +#include <linux/proc_fs.h>
>   #include <linux/debugfs.h>
>   #include <linux/pfn.h>
>   #include <linux/percpu.h>
> diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
> index 0260f5ea98fe..e981ef830252 100644
> --- a/include/linux/proc_fs.h
> +++ b/include/linux/proc_fs.h
> @@ -158,6 +158,8 @@ int proc_pid_arch_status(struct seq_file *m, struct pid_namespace *ns,
>   			struct pid *pid, struct task_struct *task);
>   #endif /* CONFIG_PROC_PID_ARCH_STATUS */
>
> +extern void arch_report_meminfo(struct seq_file *m);
> +
>   #else /* CONFIG_PROC_FS */
>
>   static inline void proc_root_init(void)