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Date: Fri, 8 Aug 2014 13:38:00 -0700 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Steve Capper <steve.capper@...aro.org>, Catalin Marinas <catalin.marinas@....com>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 3.13 057/259] arm64: mm: Make icache synchronisation logic huge page aware 3.13.11.6 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Steve Capper <steve.capper@...aro.org> commit 923b8f5044da753e4985ab15c1374ced2cdf616c upstream. The __sync_icache_dcache routine will only flush the dcache for the first page of a compound page, potentially leading to stale icache data residing further on in a hugetlb page. This patch addresses this issue by taking into consideration the order of the page when flushing the dcache. Reported-by: Mark Brown <broonie@...aro.org> Tested-by: Mark Brown <broonie@...aro.org> Signed-off-by: Steve Capper <steve.capper@...aro.org> Acked-by: Will Deacon <will.deacon@....com> Signed-off-by: Catalin Marinas <catalin.marinas@....com> Signed-off-by: Kamal Mostafa <kamal@...onical.com> --- arch/arm64/mm/flush.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c index e4193e3..0d64089 100644 --- a/arch/arm64/mm/flush.c +++ b/arch/arm64/mm/flush.c @@ -79,7 +79,8 @@ void __sync_icache_dcache(pte_t pte, unsigned long addr) return; if (!test_and_set_bit(PG_dcache_clean, &page->flags)) { - __flush_dcache_area(page_address(page), PAGE_SIZE); + __flush_dcache_area(page_address(page), + PAGE_SIZE << compound_order(page)); __flush_icache_all(); } else if (icache_is_aivivt()) { __flush_icache_all(); -- 1.9.1 -- 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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