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| author | Matthew Wilcox (Oracle) <[email protected]> | 2025-05-14 17:06:02 +0000 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2025-05-21 05:49:39 +0000 |
| commit | 97dfbbd135cb5e4426f37ca53a8fa87eaaa4e376 (patch) | |
| tree | e60d991ee4228e6d5dd69010c119e4fa325ec3a3 /rust/helpers/task.c | |
| parent | MAINTAINERS: add hung-task detector section (diff) | |
| download | kernel-97dfbbd135cb5e4426f37ca53a8fa87eaaa4e376.tar.gz kernel-97dfbbd135cb5e4426f37ca53a8fa87eaaa4e376.zip | |
highmem: add folio_test_partial_kmap()
In commit c749d9b7ebbc ("iov_iter: fix copy_page_from_iter_atomic() if
KMAP_LOCAL_FORCE_MAP"), Hugh correctly noted that if KMAP_LOCAL_FORCE_MAP
is enabled, we must limit ourselves to PAGE_SIZE bytes per call to
kmap_local(). The same problem exists in memcpy_from_folio(),
memcpy_to_folio(), folio_zero_tail(), folio_fill_tail() and
memcpy_from_file_folio(), so add folio_test_partial_kmap() to do this more
succinctly.
Link: https://lkml.kernel.org/r/[email protected]
Fixes: 00cdf76012ab ("mm: add memcpy_from_file_folio()")
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'rust/helpers/task.c')
0 files changed, 0 insertions, 0 deletions