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[v2,18/18] fbdev: Document that framebuffer_alloc() returns zero'ed data

Message ID 20230713130338.31086-19-tzimmermann@suse.de
State New
Headers show
Series fbdev: Remove FBINFO_DEFAULT and FBINFO_FLAG_DEFAULT flags | expand

Commit Message

Thomas Zimmermann July 13, 2023, 12:58 p.m. UTC 
Most fbdev drivers depend on framebuffer_alloc() to initialize the
allocated memory to 0. Document this guarantee.

Suggested-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
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..1b7615fc393d 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). Both, the instance of struct fb_info and
+ * the driver private data, are cleared to zero.
  *
  * Returns the new structure, or NULL if an error occurred.
  *