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Commit b7dc8d16 authored by Miles Chen's avatar Miles Chen Committed by Catalin Marinas
Browse files

arm64/mm: remove unnecessary boundary check 



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: default avatarMiles Chen <miles.chen@mediatek.com>
Acked-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent cac4b8cd

arch/arm64/mm/init.c

+0 −2
Original line number Diff line number Diff line
@@ -401,8 +401,6 @@ void __init mem_init(void) 
#ifdef CONFIG_COMPAT

	BUILD_BUG_ON(TASK_SIZE_32			> TASK_SIZE_64);

#endif

	BUILD_BUG_ON(TASK_SIZE_64			> MODULES_VADDR);

	BUG_ON(TASK_SIZE_64				> MODULES_VADDR);



	if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) {

		extern int sysctl_overcommit_memory;