fbdev/defio: Early-out if page is already enlisted

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Return early if a page is already in the list of dirty pages for
deferred I/O. This can be detected if the page's list head is not
empty. Keep the list head initialized while the page is not enlisted
to make this work reliably.

v2:
	* update comment and fix spelling (Sam)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220211094640.21632-2-tzimmermann@suse.de

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This commit is contained in:

Thomas Zimmermann 2022-02-11 10:46:39 +01:00

parent 21d26b3972

commit 105a940416

1 changed files with 17 additions and 9 deletions

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26

drivers/video/fbdev/core/fb_defio.c

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