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Message-Id: <1408726399-4436-3-git-send-email-tj@kernel.org> Date: Fri, 22 Aug 2014 12:53:06 -0400 From: Tejun Heo <tj@...nel.org> To: akpm@...ux-foundation.org, cl@...ux-foundation.org Cc: laijs@...fujitsu.com, linux-kernel@...r.kernel.org, vgoyal@...hat.com, Tejun Heo <tj@...nel.org>, stable@...r.kernel.org Subject: [PATCH 02/15] percpu: perform tlb flush after pcpu_map_pages() failure If pcpu_map_pages() fails midway, it unmaps the already mapped pages. Currently, it doesn't flush tlb after the partial unmapping. This may be okay in most cases as the established mapping hasn't been used at that point but it can go wrong and when it goes wrong it'd be extremely difficult to track down. Flush tlb after the partial unmapping. Signed-off-by: Tejun Heo <tj@...nel.org> Cc: stable@...r.kernel.org --- mm/percpu-vm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/percpu-vm.c b/mm/percpu-vm.c index 8d9bb2c..5110816 100644 --- a/mm/percpu-vm.c +++ b/mm/percpu-vm.c @@ -272,6 +272,7 @@ err: __pcpu_unmap_pages(pcpu_chunk_addr(chunk, tcpu, page_start), page_end - page_start); } + pcpu_post_unmap_tlb_flush(chunk, page_start, page_end); return err; } -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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