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| author | Arnd Bergmann <[email protected]> | 2022-02-14 08:00:10 +0000 |
|---|---|---|
| committer | Arnd Bergmann <[email protected]> | 2022-02-25 08:36:05 +0000 |
| commit | 52fe8d125c9afecc6fff6afd9950a388488df2ce (patch) | |
| tree | ec9fa16bb2f988f2625b9bf66443e10c2819f6a5 /lib/strncpy_from_user.c | |
| parent | m68k: fix access_ok for coldfire (diff) | |
| download | kernel-52fe8d125c9afecc6fff6afd9950a388488df2ce.tar.gz kernel-52fe8d125c9afecc6fff6afd9950a388488df2ce.zip | |
arm64: simplify access_ok()
arm64 has an inline asm implementation of access_ok() that is derived from
the 32-bit arm version and optimized for the case that both the limit and
the size are variable. With set_fs() gone, the limit is always constant,
and the size usually is as well, so just using the default implementation
reduces the check into a comparison against a constant that can be
scheduled by the compiler.
On a defconfig build, this saves over 28KB of .text.
Acked-by: Robin Murphy <[email protected]>
Acked-by: Mark Rutland <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
Diffstat (limited to 'lib/strncpy_from_user.c')
0 files changed, 0 insertions, 0 deletions