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author | Max Kellermann <max.kellermann@ionos.com> | 2023-09-19 10:37:42 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-05 14:34:05 +0300 |
commit | 1b057bd800c3ea0c926191d7950cd2365eddc9bb (patch) | |
tree | fd2479575d90eea9432fb808cc0ed3119197f9bf /Documentation/process/stable-kernel-rules.rst | |
parent | 19e3e6cdfdc73400eb68d1102cdbad4f9493f474 (diff) | |
download | linux-1b057bd800c3ea0c926191d7950cd2365eddc9bb.tar.xz |
drivers/char/mem: implement splice() for /dev/zero, /dev/full
This allows splicing zeroed pages into a pipe, and allows discarding
pages from a pipe by splicing them to /dev/zero. Writing to /dev/zero
should have the same effect as writing to /dev/null, and a
"splice_write" implementation exists only for /dev/null.
(The /dev/zero splice_read implementation could be optimized by
pushing references to the global zero page to the pipe, but that's an
optimization for another day.)
Signed-off-by: Max Kellermann <max.kellermann@ionos.com>
Link: https://lore.kernel.org/r/20230919073743.1066313-1-max.kellermann@ionos.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/process/stable-kernel-rules.rst')
0 files changed, 0 insertions, 0 deletions