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| author | Fabio M. De Francesco <[email protected]> | 2022-07-28 15:48:41 +0000 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2022-08-09 01:06:45 +0000 |
| commit | 6b3afe2eeec27a148b83235484149f42b22ef793 (patch) | |
| tree | d1e02a13185f2d1ab7cac003c33c7a811ccb69d7 /drivers/usb/cdns3/cdns3-ti.c | |
| parent | Documentation/mm: don't kmap*() pages which can't come from HIGHMEM (diff) | |
| download | kernel-6b3afe2eeec27a148b83235484149f42b22ef793.tar.gz kernel-6b3afe2eeec27a148b83235484149f42b22ef793.zip | |
Documentation/mm: avoid invalid use of addresses from kmap_local_page()
Users of kmap_local_page() must be absolutely sure to not hand kernel
virtual address obtained calling kmap_local_page() on highmem pages to
other contexts because those pointers are thread local, therefore, they
are no longer valid across different contexts.
Extend the documentation of kmap_local_page() to warn users about the
above-mentioned potential invalid use of pointers returned by
kmap_local_page().
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Fabio M. De Francesco <[email protected]>
Suggested-by: Ira Weiny <[email protected]>
Cc: Matthew Wilcox (Oracle) <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Sebastian Andrzej Siewior <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Peter Collingbourne <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'drivers/usb/cdns3/cdns3-ti.c')
0 files changed, 0 insertions, 0 deletions