diff options
| author | Baoquan He <bhe@redhat.com> | 2014-10-13 15:53:42 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-14 02:18:21 +0200 |
| commit | a2d6aa8fa0750fe1d2fc9673d4a46b2fd87e44b3 (patch) | |
| tree | 87a101e8d879885b8515eefc338e2e99a105b15e /arch | |
| parent | 669280a152ce5144321c0e511498877383f34393 (diff) | |
| download | linux-a2d6aa8fa0750fe1d2fc9673d4a46b2fd87e44b3.tar.gz | |
kexec: check if crashk_res_low exists when exclude it from crash mem ranges
Add a check if crashk_res_low exists just like GART region does. If crashk_res_low doesn't exist, calling exclude_mem_range is unnecessary. Meanwhile, since crashk_res_low has been initialized at definition, it's safe just use "if (crashk_low_res.end)" to check if it's exist. And this can make it consistent with other places of check. Signed-off-by: Baoquan He <bhe@redhat.com> Acked-by: Vivek Goyal <vgoyal@redhat.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/crash.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c index a618fcd2c07d..f5ab56d14287 100644 --- a/arch/x86/kernel/crash.c +++ b/arch/x86/kernel/crash.c @@ -237,7 +237,7 @@ static void fill_up_crash_elf_data(struct crash_elf_data *ced, ced->max_nr_ranges++; /* If crashk_low_res is not 0, another range split possible */ - if (crashk_low_res.end != 0) + if (crashk_low_res.end) ced->max_nr_ranges++; } @@ -335,9 +335,11 @@ static int elf_header_exclude_ranges(struct crash_elf_data *ced, if (ret) return ret; - ret = exclude_mem_range(cmem, crashk_low_res.start, crashk_low_res.end); - if (ret) - return ret; + if (crashk_low_res.end) { + ret = exclude_mem_range(cmem, crashk_low_res.start, crashk_low_res.end); + if (ret) + return ret; + } /* Exclude GART region */ if (ced->gart_end) { |