From 5a9e3e156ec1ab26ba70b4c44157858c92bbeee0 Mon Sep 17 00:00:00 2001 From: Jisheng Zhang Date: Mon, 15 Aug 2016 14:45:46 +0800 Subject: arm64: apply __ro_after_init to some objects These objects are set during initialization, thereafter are read only. Previously I only want to mark vdso_pages, vdso_spec, vectors_page and cpu_ops as __read_mostly from performance point of view. Then inspired by Kees's patch[1] to apply more __ro_after_init for arm, I think it's better to mark them as __ro_after_init. What's more, I find some more objects are also read only after init. So apply __ro_after_init to all of them. This patch also removes global vdso_pagelist and tries to clean up vdso_spec[] assignment code. [1] http://www.spinics.net/lists/arm-kernel/msg523188.html Acked-by: Mark Rutland Signed-off-by: Jisheng Zhang Signed-off-by: Will Deacon --- arch/arm64/mm/mmu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch/arm64/mm/mmu.c') diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 4989948d1feb..e634a0f6d62b 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -17,6 +17,7 @@ * along with this program. If not, see . */ +#include #include #include #include @@ -46,7 +47,7 @@ u64 idmap_t0sz = TCR_T0SZ(VA_BITS); -u64 kimage_voffset __read_mostly; +u64 kimage_voffset __ro_after_init; EXPORT_SYMBOL(kimage_voffset); /* -- cgit v1.2.3