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author | David Hildenbrand <dahi@linux.vnet.ibm.com> | 2015-05-11 17:52:10 +0200 |
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committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 08:39:15 +0200 |
commit | ce01948eb85da733558fa77c2a554144a57ab0fb (patch) | |
tree | 4fecfe4c672e05fb36afc1813fd8dded81dee4d9 /arch/x86/mm/pageattr-test.c | |
parent | 2cb7c9cb426660b5ed58b643d9e7dd5d50ba901f (diff) | |
download | linux-stable-ce01948eb85da733558fa77c2a554144a57ab0fb.tar.gz linux-stable-ce01948eb85da733558fa77c2a554144a57ab0fb.tar.bz2 linux-stable-ce01948eb85da733558fa77c2a554144a57ab0fb.zip |
sched/preempt, mm/kmap, MIPS: Disable preemption in kmap_coherent() explicitly
k(un)map_coherent relies on pagefault_disable() to also disable
preemption.
Let's make this explicit, to prepare for pagefault_disable() not
touching preemption anymore.
This patch is based on a patch by Yang Shi on the -rt tree:
"k{un}map_coherent are just called when cpu_has_dc_aliases == 1 with VIPT
cache. However, actually, the most modern MIPS processors have PIPT dcache
without dcache alias issue. In such case, k{un}map_atomic will be called
with preempt enabled."
Reviewed-and-tested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: David.Laight@ACULAB.COM
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: airlied@linux.ie
Cc: akpm@linux-foundation.org
Cc: benh@kernel.crashing.org
Cc: bigeasy@linutronix.de
Cc: borntraeger@de.ibm.com
Cc: daniel.vetter@intel.com
Cc: heiko.carstens@de.ibm.com
Cc: herbert@gondor.apana.org.au
Cc: hocko@suse.cz
Cc: hughd@google.com
Cc: mst@redhat.com
Cc: paulus@samba.org
Cc: ralf@linux-mips.org
Cc: schwidefsky@de.ibm.com
Cc: yang.shi@windriver.com
Link: http://lkml.kernel.org/r/1431359540-32227-6-git-send-email-dahi@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/mm/pageattr-test.c')
0 files changed, 0 insertions, 0 deletions