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| author | Mika Westerberg <mika.westerberg@iki.fi> | 2010-11-19 11:29:24 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-11-30 16:39:55 +0300 |
| commit | 9833c39400c3e6ee19daeded6910df648741611e (patch) | |
| tree | 49fde990e2f08c5751f9f6923d32812580f87ff2 | |
| parent | e8a7e48bb248a1196484d3f8afa53bded2b24e71 (diff) | |
| download | linux-9833c39400c3e6ee19daeded6910df648741611e.tar.xz | |
ARM: 6485/5: proc/vmcore - allow archs to override vmcore_elf_check_arch()
Allow architectures to redefine this macro if needed. This is useful for
example in architectures where 64-bit ELF vmcores are not supported.
Specifying zero vmcore_elf64_check_arch() allows compiler to optimize
away unnecessary parts of parse_crash_elf64_headers().
We also rename the macro to vmcore_elf64_check_arch() to reflect that it
is used for 64-bit vmcores only.
Signed-off-by: Mika Westerberg <mika.westerberg@iki.fi>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | fs/proc/vmcore.c | 2 | ||||
| -rw-r--r-- | include/linux/crash_dump.h | 9 |
2 files changed, 9 insertions, 2 deletions
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c index 2367fb3f70bc..74802bc5ded9 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -499,7 +499,7 @@ static int __init parse_crash_elf64_headers(void) /* Do some basic Verification. */ if (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0 || (ehdr.e_type != ET_CORE) || - !vmcore_elf_check_arch(&ehdr) || + !vmcore_elf64_check_arch(&ehdr) || ehdr.e_ident[EI_CLASS] != ELFCLASS64 || ehdr.e_ident[EI_VERSION] != EV_CURRENT || ehdr.e_version != EV_CURRENT || diff --git a/include/linux/crash_dump.h b/include/linux/crash_dump.h index 0026f267da20..088cd4ace4ef 100644 --- a/include/linux/crash_dump.h +++ b/include/linux/crash_dump.h @@ -20,7 +20,14 @@ extern ssize_t copy_oldmem_page(unsigned long, char *, size_t, #define vmcore_elf_check_arch_cross(x) 0 #endif -#define vmcore_elf_check_arch(x) (elf_check_arch(x) || vmcore_elf_check_arch_cross(x)) +/* + * Architecture code can redefine this if there are any special checks + * needed for 64-bit ELF vmcores. In case of 32-bit only architecture, + * this can be set to zero. + */ +#ifndef vmcore_elf64_check_arch +#define vmcore_elf64_check_arch(x) (elf_check_arch(x) || vmcore_elf_check_arch_cross(x)) +#endif /* * is_kdump_kernel() checks whether this kernel is booting after a panic of |