tree 5d8bd8ce094e7330ef51c159e9ceb03d91f3cdca
parent 7b1cd95d65eb3b1e13f8a90eb757e0ea232c7899
author Jan H. Schönherr <jschoenh@amazon.de> 1517444044 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1517447914 -0800

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@amazon.de
Fixes: f729c8c9b24f ("dax: wrprotect pmd_t in dax_mapping_entry_mkclean")
Signed-off-by: Jan H. Schönherr <jschoenh@amazon.de>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>