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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-07-02 15:20:44 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2012-01-26 20:06:28 +0000
commit67ece1443174d852e71c42facb3e2d7dd338c88a (patch)
tree418359d432acfcb2ecc4c58c8afa5f73de4fa01e /arch/arm/mm/copypage-v6.c
parent6e78df176141f2cb673bed7fa47825e3c6a8719f (diff)
ARM: pgtable: consolidate set_pte_ext(TOP_PTE,...) + tlb flush
A number of places establish a PTE in our top page table and immediately flush the TLB. Rather than having this at every callsite, provide an inline function for this purpose. This changes some global tlb flushes to be local; each time we setup one of these mappings, we always do it with preemption disabled which would prevent us migrating to another CPU. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/copypage-v6.c')
-rw-r--r--arch/arm/mm/copypage-v6.c10
1 files changed, 3 insertions, 7 deletions
diff --git a/arch/arm/mm/copypage-v6.c b/arch/arm/mm/copypage-v6.c
index 86524591b1b5..29c770463e41 100644
--- a/arch/arm/mm/copypage-v6.c
+++ b/arch/arm/mm/copypage-v6.c
@@ -90,11 +90,8 @@ static void v6_copy_user_highpage_aliasing(struct page *to,
kfrom = COPYPAGE_V6_FROM + (offset << PAGE_SHIFT);
kto = COPYPAGE_V6_TO + (offset << PAGE_SHIFT);
- set_pte_ext(TOP_PTE(kfrom), mk_pte(from, PAGE_KERNEL), 0);
- set_pte_ext(TOP_PTE(kto), mk_pte(to, PAGE_KERNEL), 0);
-
- flush_tlb_kernel_page(kfrom);
- flush_tlb_kernel_page(kto);
+ set_top_pte(kfrom, mk_pte(from, PAGE_KERNEL));
+ set_top_pte(kto, mk_pte(to, PAGE_KERNEL));
copy_page((void *)kto, (void *)kfrom);
@@ -119,8 +116,7 @@ static void v6_clear_user_highpage_aliasing(struct page *page, unsigned long vad
*/
raw_spin_lock(&v6_lock);
- set_pte_ext(TOP_PTE(to), mk_pte(page, PAGE_KERNEL), 0);
- flush_tlb_kernel_page(to);
+ set_top_pte(to, mk_pte(page, PAGE_KERNEL));
clear_page((void *)to);
raw_spin_unlock(&v6_lock);