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| author | Tycho Andersen <tycho@docker.com> | 2017-05-04 16:15:51 -0600 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2017-05-16 11:23:16 -0400 |
| commit | 5d7a288caf6d9b839a9a5bd28e56e15678669e67 (patch) | |
| tree | e1546dd0e4b6e9f3efd85c781a16729815452be2 /tools/perf/scripts/python/bin/stackcollapse-record | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net (diff) | |
| download | linux-5d7a288caf6d9b839a9a5bd28e56e15678669e67.tar.gz linux-5d7a288caf6d9b839a9a5bd28e56e15678669e67.zip | |
ata-sff: always map page before data transfer
The XPFO [1] patchset may unmap pages from physmap if they happened to be
destined for userspace. If such a page is unmapped, it needs to be
remapped. Rather than test if a page is in the highmem/xpfo unmapped state,
Christoph suggested [2] that we simply always map the page.
v2: * drop comment about bounce buffer
* don't save IRQs before kmap/unmap
* formatting
[1]: https://lkml.org/lkml/2016/11/4/245
[2]: https://lkml.org/lkml/2016/11/4/253
Suggested-and-reviewed-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tycho Andersen <tycho@docker.com>
CC: Juerg Haefliger <juerg.haefliger@hpe.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-record')
0 files changed, 0 insertions, 0 deletions