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 <b...@redhat.com>
---
arch/x86/kernel/crash.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
index 0553a34..c9e83f9 100644
--- a/arch/x86/kernel/crash.c
+++ b/arch/x86/kernel/crash.c
@@ -238,7 +238,7 @@ 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++;
}
@@ -336,9 +336,11 @@ 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) {
--
1.8.5.3
--
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