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Message-ID: <1444791077-26020-1-git-send-email-shengjiu.wang@freescale.com> Date: Wed, 14 Oct 2015 10:51:17 +0800 From: Shengjiu Wang <shengjiu.wang@...escale.com> To: <linux@....linux.org.uk>, <nico@...aro.org>, <ard.biesheuvel@...aro.org> CC: <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, <shengjiu.wang@...escale.com> Subject: [PATCH] ARM: SWP emulation: Restore original *data when failed __user_swpX_asm maybe failed in first STREX operation, emulate_swpX will try again, but the *data has been changed in first time. which cause the result is wrong. So need to recover the *data when failed. Signed-off-by: Shengjiu Wang <shengjiu.wang@...escale.com> --- arch/arm/kernel/swp_emulate.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/kernel/swp_emulate.c b/arch/arm/kernel/swp_emulate.c index 5b26e7e..c61fbf92 100644 --- a/arch/arm/kernel/swp_emulate.c +++ b/arch/arm/kernel/swp_emulate.c @@ -41,6 +41,7 @@ "1: strex"B" %0, %2, [%3]\n" \ " cmp %0, #0\n" \ " movne %0, %4\n" \ + " movne %1, %2\n" \ "2:\n" \ " .section .text.fixup,\"ax\"\n" \ " .align 2\n" \ -- 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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