diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2022-03-13 20:29:51 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-30 16:31:52 +0200 |
| commit | 1d41b658533dbfd9a52eba14e51d0f549083b448 (patch) | |
| tree | 3d0fbdfcba728d2c7fe5fa64e9a02e198de3a9eb /include/linux/perf | |
| parent | 0f19b70e9bc57079c20794216847c43a359befe8 (diff) | |
fbdev: Fix sys_imageblit() for arbitrary image widths
[ Upstream commit 61bfcb6a3b981e8f19e044ac8c3de6edbe6caf70 ]
Commit 6f29e04938bf ("fbdev: Improve performance of sys_imageblit()")
broke sys_imageblit() for image width that are not aligned to 8-bit
boundaries. Fix this by handling the trailing pixels on each line
separately. The performance improvements in the original commit do not
regress by this change.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: 6f29e04938bf ("fbdev: Improve performance of sys_imageblit()")
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Javier Martinez Canillas <javierm@redhat.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220313192952.12058-2-tzimmermann@suse.de
Stable-dep-of: c2d22806aecb ("fbdev: fix potential OOB read in fast_imageblit()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/linux/perf')
0 files changed, 0 insertions, 0 deletions