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| author |   Nicholas Piggin <npiggin@gmail.com> | 2019-06-07 13:56:36 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2019-06-07 16:28:28 +1000 |
| commit | a00196a272161338d4b1d66ec69e3d57c6b280e0 (patch) | |
| tree | 8c1b21d16a2fede66919f4809292087fde2a3215 /arch/powerpc/kernel | |
| parent | powerpc/64s: Fix THP PMD collapse serialisation (diff) | |
| download | linux-dev-a00196a272161338d4b1d66ec69e3d57c6b280e0.tar.xz linux-dev-a00196a272161338d4b1d66ec69e3d57c6b280e0.zip | |
powerpc/64s: __find_linux_pte() synchronization vs pmdp_invalidate()
The change to pmdp_invalidate() to mark the pmd with _PAGE_INVALID
broke the synchronisation against lock free lookups,
__find_linux_pte()'s pmd_none() check no longer returns true for such
cases.
Fix this by adding a check for this condition as well.
Fixes: da7ad366b497 ("powerpc/mm/book3s: Update pmd_present to look at _PAGE_PRESENT bit")
Cc: stable@vger.kernel.org # v4.20+
Suggested-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel')
0 files changed, 0 insertions, 0 deletions