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x86/mm: Rename is_kernel_text to __is_kernel_text

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The kbuild test robot reported compile issue on x86 in one of
the following patches that adds <linux/kallsyms.h> include into
<linux/bpf.h>, which is picked up by init_32.c object.

The problem is that <linux/kallsyms.h> defines global function
is_kernel_text which colides with the static function of the
same name defined in init_32.c:

  $ make ARCH=i386
  ...
  >> arch/x86/mm/init_32.c:241:19: error: redefinition of 'is_kernel_text'
    static inline int is_kernel_text(unsigned long addr)
                      ^~~~~~~~~~~~~~
   In file included from include/linux/bpf.h:21:0,
                    from include/linux/bpf-cgroup.h:5,
                    from include/linux/cgroup-defs.h:22,
                    from include/linux/cgroup.h:28,
                    from include/linux/hugetlb.h:9,
                    from arch/x86/mm/init_32.c:18:
   include/linux/kallsyms.h:31:19: note: previous definition of 'is_kernel_text' was here
    static inline int is_kernel_text(unsigned long addr)

Renaming the init_32.c is_kernel_text function to __is_kernel_text.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200312195610.346362-2-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jiri Olsa 2020-03-12 20:55:56 +01:00 committed by Alexei Starovoitov
parent 9886866836
commit b56cd05c55
1 changed files with 9 additions and 5 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

14
arch/x86/mm/init_32.c
View file

@ -238,7 +238,11 @@ page_table_range_init(unsigned long start, unsigned long end, pgd_t *pgd_base)
}
}
static inline int is_kernel_text(unsigned long addr)
/*
* The <linux/kallsyms.h> already defines is_kernel_text,
* using '__' prefix not to get in conflict.
*/
static inline int __is_kernel_text(unsigned long addr)
{
if (addr >= (unsigned long)_text && addr <= (unsigned long)__init_end)
return 1;
@ -328,8 +332,8 @@ kernel_physical_mapping_init(unsigned long start,
addr2 = (pfn + PTRS_PER_PTE-1) * PAGE_SIZE +
PAGE_OFFSET + PAGE_SIZE-1;
if (is_kernel_text(addr) ||
is_kernel_text(addr2))
if (__is_kernel_text(addr) ||
__is_kernel_text(addr2))
prot = PAGE_KERNEL_LARGE_EXEC;
pages_2m++;
@ -354,7 +358,7 @@ kernel_physical_mapping_init(unsigned long start,
*/
pgprot_t init_prot = __pgprot(PTE_IDENT_ATTR);
if (is_kernel_text(addr))
if (__is_kernel_text(addr))
prot = PAGE_KERNEL_EXEC;
pages_4k++;
@ -881,7 +885,7 @@ static void mark_nxdata_nx(void)
*/
unsigned long start = PFN_ALIGN(_etext);
/*
* This comes from is_kernel_text upper limit. Also HPAGE where used:
* This comes from __is_kernel_text upper limit. Also HPAGE where used:
*/
unsigned long size = (((unsigned long)__init_end + HPAGE_SIZE) & HPAGE_MASK) - start;