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arm64: make sys_call_table const

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As with x86, mark the sys_call_table const such that it will be placed
in the .rodata section. This will cause attempts to modify the table
(accidental or deliberate) to fail when strict page permissions are in
place. In the absence of strict page permissions, there should be no
functional change.

Change-Id: I5b8fcf486c59cb1d83c117c5246eeb2447ccfb65
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Git-repo: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git
Git-commit: c623b33b4e9599c6ac5076f7db7369eb9869aa04
Signed-off-by: Ravi Kumar Siddojigari <rsiddoji@codeaurora.org>
This commit is contained in:
Mark Rutland 2015-01-08 11:42:59 +00:00 committed by Gerrit - the friendly Code Review server
parent 23f253841d
commit 1cad4595ae
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/kernel/sys.c
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@ -50,7 +50,7 @@ asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
* The sys_call_table array must be 4K aligned to be accessible from
* kernel/entry.S.
*/
void *sys_call_table[__NR_syscalls] __aligned(4096) = {
void * const sys_call_table[__NR_syscalls] __aligned(4096) = {
[0 ... __NR_syscalls - 1] = sys_ni_syscall,
#include <asm/unistd.h>
};