Rework the fbdev deferred-I/O to not interfere with fields of struct page. All references from deferred-I/O code to fields in struct page are gone. The rsp state is help in a separate pageref structure.
Version 1 of this patchset was part of a larger attempt to improve GEM SHMEM support. [1] The patches can already be merged to resolve a long-standing issue in the fbdev code.
[1] https://lore.kernel.org/dri-devel/20220303205839.28484-1-tzimmermann@suse.de...
Thomas Zimmermann (3): fbdev: Put mmap for deferred I/O into drivers fbdev: Track deferred-I/O pages in pageref struct fbdev: Refactor implementation of page_mkwrite
drivers/gpu/drm/drm_fb_helper.c | 10 +- drivers/gpu/drm/vmwgfx/vmwgfx_fb.c | 6 +- drivers/hid/hid-picolcd_fb.c | 1 + drivers/staging/fbtft/fbtft-core.c | 6 +- drivers/video/fbdev/broadsheetfb.c | 6 +- drivers/video/fbdev/core/fb_defio.c | 213 +++++++++++++++++-------- drivers/video/fbdev/core/fbmem.c | 19 ++- drivers/video/fbdev/hecubafb.c | 1 + drivers/video/fbdev/hyperv_fb.c | 6 +- drivers/video/fbdev/metronomefb.c | 6 +- drivers/video/fbdev/sh_mobile_lcdcfb.c | 12 +- drivers/video/fbdev/smscufx.c | 8 +- drivers/video/fbdev/ssd1307fb.c | 1 + drivers/video/fbdev/udlfb.c | 8 +- drivers/video/fbdev/xen-fbfront.c | 6 +- include/linux/fb.h | 11 +- 16 files changed, 221 insertions(+), 99 deletions(-)
base-commit: 0e7deff6446a4ba2c75f499a0bfa80cd6a15c129