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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-09 09:54:04 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-09 09:54:04 -0800 |
| commit | fa82dcbf2aed65dc3ea78eaca9ea56fd926b2b10 (patch) | |
| tree | f3ae8794c5456468a5e25ca6bb6af18a688d3749 /mm | |
| parent | bd799eb63db4c61a5f2dc941672391fbca5bcab4 (diff) | |
| parent | 27359fd6e5f3c5db8fe544b63238b6170e8806d8 (diff) | |
| download | linux-fa82dcbf2aed65dc3ea78eaca9ea56fd926b2b10.tar.bz2 | |
Merge tag 'dax-fixes-4.20-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull dax fixes from Dan Williams:
"The last of the known regression fixes and fallout from the Xarray
conversion of the filesystem-dax implementation.
On the path to debugging why the dax memory-failure injection test
started failing after the Xarray conversion a couple more fixes for
the dax_lock_mapping_entry(), now called dax_lock_page(), surfaced.
Those plus the bug that started the hunt are now addressed. These
patches have appeared in a -next release with no issues reported.
Note the touches to mm/memory-failure.c are just the conversion to the
new function signature for dax_lock_page().
Summary:
- Fix the Xarray conversion of fsdax to properly handle
dax_lock_mapping_entry() in the presense of pmd entries
- Fix inode destruction racing a new lock request"
* tag 'dax-fixes-4.20-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
dax: Fix unlock mismatch with updated API
dax: Don't access a freed inode
dax: Check page->mapping isn't NULL
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory-failure.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 0cd3de3550f0..7c72f2a95785 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1161,6 +1161,7 @@ static int memory_failure_dev_pagemap(unsigned long pfn, int flags, LIST_HEAD(tokill); int rc = -EBUSY; loff_t start; + dax_entry_t cookie; /* * Prevent the inode from being freed while we are interrogating @@ -1169,7 +1170,8 @@ static int memory_failure_dev_pagemap(unsigned long pfn, int flags, * also prevents changes to the mapping of this pfn until * poison signaling is complete. */ - if (!dax_lock_mapping_entry(page)) + cookie = dax_lock_page(page); + if (!cookie) goto out; if (hwpoison_filter(page)) { @@ -1220,7 +1222,7 @@ static int memory_failure_dev_pagemap(unsigned long pfn, int flags, kill_procs(&tokill, flags & MF_MUST_KILL, !unmap_success, pfn, flags); rc = 0; unlock: - dax_unlock_mapping_entry(page); + dax_unlock_page(page, cookie); out: /* drop pgmap ref acquired in caller */ put_dev_pagemap(pgmap); |