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arm64/mm: remove unnecessary boundary check

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Remove the unnecessary boundary check since there is a huge
gap between user and kernel address that they would never overlap.
(arm64 does not have enough levels of page tables to cover 64-bit
virtual address)

See Documentation/arm64/memory.txt

Signed-off-by: Miles Chen <miles.chen@mediatek.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Miles Chen
2016-02-25 11:44:34 +08:00
committed by Catalin Marinas
parent cac4b8cdf5
commit b7dc8d16e7
1 changed files with 0 additions and 2 deletions
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arch/arm64/mm/init.c
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@@ -401,8 +401,6 @@ void __init mem_init(void)
#ifdef CONFIG_COMPAT #ifdef CONFIG_COMPAT
BUILD_BUG_ON(TASK_SIZE_32 > TASK_SIZE_64); BUILD_BUG_ON(TASK_SIZE_32 > TASK_SIZE_64);
#endif #endif
BUILD_BUG_ON(TASK_SIZE_64 > MODULES_VADDR);
BUG_ON(TASK_SIZE_64 > MODULES_VADDR);
if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) { if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) {
extern int sysctl_overcommit_memory; extern int sysctl_overcommit_memory;