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[v4,18/18] fbdev: Document that framebuffer_alloc() returns zero'ed data

Message ID 20230715185343.7193-19-tzimmermann@suse.de (mailing list archive)
State Handled Elsewhere
Headers show
Series fbdev: Remove FBINFO_DEFAULT and FBINFO_FLAG_DEFAULT flags | expand

Commit Message

Thomas Zimmermann July 15, 2023, 6:52 p.m. UTC 
Most fbdev drivers depend on framebuffer_alloc() to initialize the
allocated memory to 0. Document this guarantee.

v3:
	* slightly reword the sentence (Miguel)

Suggested-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Reviewed-by: Sui Jingfeng <suijingfeng@loongson.cn>
Cc: Helge Deller <deller@gmx.de>
---
 drivers/video/fbdev/core/fb_info.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/video/fbdev/core/fb_info.c b/drivers/video/fbdev/core/fb_info.c
index 8bdbefdd4b70..4847ebe50d7d 100644
--- a/drivers/video/fbdev/core/fb_info.c
+++ b/drivers/video/fbdev/core/fb_info.c
@@ -13,7 +13,8 @@ 
  *
  * Creates a new frame buffer info structure. Also reserves @size bytes
  * for driver private data (info->par). info->par (if any) will be
- * aligned to sizeof(long).
+ * aligned to sizeof(long). The new instances of struct fb_info and
+ * the driver private data are both cleared to zero.
  *
  * Returns the new structure, or NULL if an error occurred.
  *