diff mbox series

[v3,2/4] fbdev: Add flag indicating framebuffer is allocated from kernel memory

Message ID 20250523161522.409504-3-mhklinux@outlook.com
State New
Headers show
Series fbdev: Add deferred I/O support for contiguous kernel memory framebuffers | expand

Commit Message

mhkelley58@gmail.com May 23, 2025, 4:15 p.m. UTC 
From: Michael Kelley <mhklinux@outlook.com>

Add a flag that fbdev drivers can set to indicate that the framebuffer
memory comes from alloc_pages() or similar as opposed to vmalloc()
memory. The flag is to be used by fbdev deferred I/O.

Signed-off-by: Michael Kelley <mhklinux@outlook.com>
---
Changes in v3:
* This patch is new in v3. The definition of FBINFO_KMEMFB
  was previously combined into the next patch of the series.
  [Helge Deller]

 include/linux/fb.h | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/include/linux/fb.h b/include/linux/fb.h
index 05cc251035da..a1121116eef0 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -396,6 +396,7 @@  struct fb_tile_ops {
 
 /* hints */
 #define FBINFO_VIRTFB		0x0004 /* FB is System RAM, not device. */
+#define FBINFO_KMEMFB		0x0008 /* FB is allocated in contig kernel mem */
 #define FBINFO_PARTIAL_PAN_OK	0x0040 /* otw use pan only for double-buffering */
 #define FBINFO_READS_FAST	0x0080 /* soft-copy faster than rendering */