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| author | Jiri Olsa <jolsa@kernel.org> | 2020-03-12 22:55:56 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-03-13 22:49:51 +0300 |
| commit | b56cd05c55a10afd479a1877d7f6a50d92d8536e (patch) | |
| tree | 15f9be42eabf72cda1269a2a27c234571a4710f3 /arch/x86/mm/init_32.c | |
| parent | 98868668367b24487c0b0b3298d7ca98409baf07 (diff) | |
| download | linux-b56cd05c55a10afd479a1877d7f6a50d92d8536e.tar.xz | |
x86/mm: Rename is_kernel_text to __is_kernel_text
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>
Diffstat (limited to 'arch/x86/mm/init_32.c')
| -rw-r--r-- | arch/x86/mm/init_32.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 23df4885bbed..eb6ede2c3d43 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -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 @@ repeat: 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 @@ repeat: */ 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; |