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| author |   Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2019-09-18 20:23:28 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2019-09-19 21:24:59 +1000 |
| commit | d9101bfa6adc831bda8836c4d774820553c14942 (patch) | |
| tree | 6ecb08a936eaf1af85eae2027ea0446407e53e07 /arch/powerpc/sysdev | |
| parent | powerpc: Use ftrace_graph_ret_addr() when unwinding (diff) | |
| download | linux-dev-d9101bfa6adc831bda8836c4d774820553c14942.tar.xz linux-dev-d9101bfa6adc831bda8836c4d774820553c14942.zip | |
powerpc/mm/mce: Keep irqs disabled during lockless page table walk
__find_linux_mm_pte() returns a page table entry pointer after walking
the page table without holding locks. To make it safe against a THP
split and/or collapse, we disable interrupts around the lockless page
table walk. However we need to keep interrupts disabled as long as we
use the page table entry pointer that is returned.
Fix addr_to_pfn() to do that.
Fixes: ba41e1e1ccb9 ("powerpc/mce: Hookup derror (load/store) UE errors")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
[mpe: Rearrange code slightly and tweak change log wording]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190918145328.28602-1-aneesh.kumar@linux.ibm.com
Diffstat (limited to 'arch/powerpc/sysdev')
0 files changed, 0 insertions, 0 deletions