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| author |   Ira Weiny <ira.weiny@intel.com> | 2022-03-22 14:47:58 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2022-03-22 15:57:11 -0700 |
| commit | d7ca25c53e25a9a628aaa19b5a031f115d8c353d (patch) | |
| tree | 1a677c54404423c7427d27fb06c3ddb354872f9e /mm/highmem.c | |
| parent | mm/early_ioremap: declare early_memremap_pgprot_adjust() (diff) | |
| download | wireguard-linux-d7ca25c53e25a9a628aaa19b5a031f115d8c353d.tar.xz wireguard-linux-d7ca25c53e25a9a628aaa19b5a031f115d8c353d.zip | |
highmem: document kunmap_local()
Some users of kmap() add an offset to the kmap() address to be used
during the mapping.
When converting to kmap_local_page() the base address does not need to
be stored because any address within the page can be used in
kunmap_local(). However, this was not clear from the documentation and
cause some questions.[1]
Document that any address in the page can be used in kunmap_local() to
clarify this for future users.
[1] https://lore.kernel.org/lkml/20211213154543.GM3538886@iweiny-DESK2.sc.intel.com/
[ira.weiny@intel.com: updates per Christoph]
Link: https://lkml.kernel.org/r/20220124182138.816693-1-ira.weiny@intel.com
Link: https://lkml.kernel.org/r/20220124013045.806718-1-ira.weiny@intel.com
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions