arm64: mm: only perform memstart_addr sanity check if DEBUG_VM

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Checking whether memstart_addr has been assigned every time it is
referenced adds a branch instruction that may hurt performance if
the reference in question occurs on a hot path. So only perform the
check if CONFIG_DEBUG_VM=y.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
[catalin.marinas@arm.com: replaced #ifdef with VM_BUG_ON]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Ard Biesheuvel 2016-02-22 18:46:03 +01:00 • committed by Catalin Marinas

parent 70c8abc287

commit a92405f082

1 changed files with 3 additions and 1 deletions

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arch/arm64/include/asm/memory.h

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