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(parent: 70c8abc) | patch
arm64: mm: only perform memstart_addr sanity check if DEBUG_VM
authorArd Biesheuvel <ard.biesheuvel@linaro.org>
Mon, 22 Feb 2016 17:46:03 +0000 (18:46 +0100)
committerCatalin Marinas <catalin.marinas@arm.com>
Tue, 23 Feb 2016 17:42:11 +0000 (17:42 +0000)
commita92405f082d43267575444a6927085e4c8a69e4e
treeba1521809b1a95c228956628863c8d454cd0dff7tree | snapshot
parent70c8abc28762d04e36c92e07eee2ce6ab41049cbcommit | diff
arm64: mm: only perform memstart_addr sanity check if DEBUG_VM

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>
arch/arm64/include/asm/memory.h diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)