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![]() Fix a circular locking dependency in the frame buffer console driver pushing down the mutex fb_info->lock. Circular locking dependecies occur calling the blocking fb_notifier_call_chain() with fb_info->lock held. Notifier callbacks can try to acquire mm->mmap_sem, while fb_mmap() acquires the locks in the reverse order mm->mmap_sem => fb_info->lock. Tested-by: Andrey Borzenkov <arvidjaar@mail.ru> Signed-off-by: Andrea Righi <righi.andrea@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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.. | ||
.gitignore | ||
bitblit.c | ||
dummycon.c | ||
fbcon.c | ||
fbcon.h | ||
fbcon_ccw.c | ||
fbcon_cw.c | ||
fbcon_rotate.c | ||
fbcon_rotate.h | ||
fbcon_ud.c | ||
font_6x11.c | ||
font_7x14.c | ||
font_8x8.c | ||
font_8x16.c | ||
font_10x18.c | ||
font_acorn_8x8.c | ||
font_mini_4x6.c | ||
font_pearl_8x8.c | ||
font_sun8x16.c | ||
font_sun12x22.c | ||
fonts.c | ||
Kconfig | ||
Makefile | ||
mdacon.c | ||
newport_con.c | ||
prom.uni | ||
promcon.c | ||
softcursor.c | ||
sticon.c | ||
sticore.c | ||
tileblit.c | ||
vgacon.c |