The patch titled
Subject: fs/dax.c: release PMD lock even when there is no PMD support in DAX
has been added to the -mm tree. Its filename is
dax-release-pmd-lock-even-when-there-is-no-pmd-support-in-dax.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/dax-release-pmd-lock-even-when-there-is-no-pmd-support-in-dax.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/dax-release-pmd-lock-even-when-there-is-no-pmd-support-in-dax.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Jan H. Schönherr <jschoenh@xxxxxxxxx>
Subject: fs/dax.c: release PMD lock even when there is no PMD support in DAX
follow_pte_pmd() can theoretically return after having acquired a PMD
lock, even when DAX was not compiled with CONFIG_FS_DAX_PMD.
Release the PMD lock unconditionally.
Link: http://lkml.kernel.org/r/20180118133839.20587-1-jschoenh@xxxxxxxxx
Fixes: f729c8c9b24f ("dax: wrprotect pmd_t in dax_mapping_entry_mkclean")
Signed-off-by: Jan H. Schönherr <jschoenh@xxxxxxxxx>
Reviewed-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/dax.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/dax.c~dax-release-pmd-lock-even-when-there-is-no-pmd-support-in-dax fs/dax.c
--- a/fs/dax.c~dax-release-pmd-lock-even-when-there-is-no-pmd-support-in-dax
+++ a/fs/dax.c
@@ -636,8 +636,8 @@ static void dax_mapping_entry_mkclean(st
pmd = pmd_mkclean(pmd);
set_pmd_at(vma->vm_mm, address, pmdp, pmd);
unlock_pmd:
- spin_unlock(ptl);
#endif
+ spin_unlock(ptl);
} else {
if (pfn != pte_pfn(*ptep))
goto unlock_pte;
_
Patches currently in -mm which might be from jschoenh@xxxxxxxxx are
dax-release-pmd-lock-even-when-there-is-no-pmd-support-in-dax.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
