Michael S. Tsirkin ca59809ff6 locking/x86: Use mb() around clflush() ...

The following commit:

  f8e617f458 ("sched/idle/x86: Optimize unnecessary mwait_idle() resched IPIs")

adds memory barriers around clflush(), but this seems wrong for UP since
barrier() has no effect on clflush().  We really want MFENCE, so switch
to mb() instead.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Davidlohr Bueso <dbueso@suse.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <bitbucket@online.de>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: virtualization <virtualization@lists.linux-foundation.org>
Link: http://lkml.kernel.org/r/1453921746-16178-5-git-send-email-mst@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2016-01-29 09:40:10 +01:00

..

alpha

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

arc

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

arm

Merge branch 'akpm' (patches from Andrew)

2016-01-23 11:13:56 -08:00

arm64

arm64: mm: avoid calling apply_to_page_range on empty range

2016-01-26 15:56:44 +00:00

avr32

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

blackfin

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

c6x

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

cris

Merge branch 'akpm' (patches from Andrew)

2016-01-21 12:32:08 -08:00

frv

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

h8300

Merge branch 'akpm' (patches from Andrew)

2016-01-21 12:32:08 -08:00

hexagon

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

ia64

[IA64] Enable copy_file_range syscall for ia64

2016-01-22 14:20:01 -08:00

m32r

m32r: fix m32104ut_defconfig build fail

2016-01-14 16:00:49 -08:00

m68k

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

metag

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

microblaze

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

mips

Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

2016-01-24 12:50:56 -08:00

mn10300

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

nios2

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

openrisc

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

parisc

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

powerpc

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2016-01-27 10:50:42 -08:00

s390

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2016-01-27 10:50:42 -08:00

score

…

sh

sh: fix smp_store_mb for !SMP

2016-01-26 10:18:29 +02:00

sparc

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

tile

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

um

um: kill pfn_t

2016-01-15 17:56:32 -08:00

unicore32

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00

x86

locking/x86: Use mb() around clflush()

2016-01-29 09:40:10 +01:00

xtensa

dma-mapping: remove <asm-generic/dma-coherent.h>

2016-01-20 17:09:18 -08:00

.gitignore

…

Kconfig

dma-mapping: always provide the dma_map_ops based implementation

2016-01-20 17:09:18 -08:00