On Tue, Dec 08, 2015 at 10:22:53AM +0000, Vladimir Murzin wrote: > On 15/10/15 10:30, Shengjiu Wang wrote: > > __user_swpX_asm maybe failed in first STREX operation, emulate_swpX > > will try again, but the *data has been changed in first time. which > > causes the result is wrong. > > This patch is to fix this issue. When STREX succeed, change the *data. > > if it fail, *data is not changed. > > > > Signed-off-by: Shengjiu Wang <shengjiu.w...@freescale.com> > > --- > > arch/arm/kernel/swp_emulate.c | 6 +++--- > > 1 file changed, 3 insertions(+), 3 deletions(-) > > > > diff --git a/arch/arm/kernel/swp_emulate.c b/arch/arm/kernel/swp_emulate.c > > index 5b26e7e..c3fe769d 100644 > > --- a/arch/arm/kernel/swp_emulate.c > > +++ b/arch/arm/kernel/swp_emulate.c > > @@ -36,10 +36,10 @@ > > */ > > #define __user_swpX_asm(data, addr, res, temp, B) \ > > __asm__ __volatile__( \ > > - " mov %2, %1\n" \ > > - "0: ldrex"B" %1, [%3]\n" \ > > - "1: strex"B" %0, %2, [%3]\n" \ > > + "0: ldrex"B" %2, [%3]\n" \ > > + "1: strex"B" %0, %1, [%3]\n" \ > > " cmp %0, #0\n" \ > > + " moveq %1, %2\n" \ > > " movne %0, %4\n" \ > > "2:\n" \ > > " .section .text.fixup,\"ax\"\n" \ > > > > I wonder what is status of this patch? I see that arm64 counterpart has > landed in mainline, but I didn't manage to track down this one - is it > because it never been submitted to patch system?
Most probably. -- RMK's Patch system: http://www.arm.linux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
