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Subject[PATCH 1/3] x86: reserve_crashkernel: use memblock_is_region_reserved to simplify code
Use memblock_is_region_reserved instead of memblock_find_in_range
to simplify the check codes, and gain a little speed benefit.

Signed-off-by: Wang YanQing <udknight@gmail.com>
---
arch/x86/kernel/setup.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 90d8cc9..9d60c85 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -577,11 +577,7 @@ static void __init reserve_crashkernel(void)
}

} else {
- unsigned long long start;
-
- start = memblock_find_in_range(crash_base,
- crash_base + crash_size, crash_size, 1<<20);
- if (start != crash_base) {
+ if (memblock_is_region_reserved(crash_base, crash_size)) {
pr_info("crashkernel reservation failed - memory is in use.\n");
return;
}
--
1.7.12.4.dirty

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