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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2005-11-28 13:43:52 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-28 14:42:23 -0800
commit1a9c3f78a32ddc4ec50f5da2cf2db5db6f442986 (patch)
tree4f0a03b971bf6ca17ed0ec6db4f42e24fca294dd /drivers/video/console/fbcon_rotate.h
parent8080f231224ccd3169f39e73fd750ba98d5b98a7 (diff)
[PATCH] Console rotation fixes
Remove bogus usage of test/set_bit() from fbcon rotation code and just manipulate the bits directly. This fixes an oops on powerpc among others and should be faster. Seems to work fine on the G5 here. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/video/console/fbcon_rotate.h')
-rw-r--r--drivers/video/console/fbcon_rotate.h13
1 files changed, 3 insertions, 10 deletions
diff --git a/drivers/video/console/fbcon_rotate.h b/drivers/video/console/fbcon_rotate.h
index e504fbf5c60..1b8f92fdc6a 100644
--- a/drivers/video/console/fbcon_rotate.h
+++ b/drivers/video/console/fbcon_rotate.h
@@ -21,21 +21,13 @@
(s == SCROLL_REDRAW || s == SCROLL_MOVE || !(i)->fix.xpanstep) ? \
(i)->var.xres : (i)->var.xres_virtual; })
-/*
- * The bitmap is always big endian
- */
-#if defined(__LITTLE_ENDIAN)
-#define FBCON_BIT(b) (7 - (b))
-#else
-#define FBCON_BIT(b) (b)
-#endif
static inline int pattern_test_bit(u32 x, u32 y, u32 pitch, const char *pat)
{
u32 tmp = (y * pitch) + x, index = tmp / 8, bit = tmp % 8;
pat +=index;
- return (test_bit(FBCON_BIT(bit), (void *)pat));
+ return (*pat) & (0x80 >> bit);
}
static inline void pattern_set_bit(u32 x, u32 y, u32 pitch, char *pat)
@@ -43,7 +35,8 @@ static inline void pattern_set_bit(u32 x, u32 y, u32 pitch, char *pat)
u32 tmp = (y * pitch) + x, index = tmp / 8, bit = tmp % 8;
pat += index;
- set_bit(FBCON_BIT(bit), (void *)pat);
+
+ (*pat) |= 0x80 >> bit;
}
static inline void rotate_ud(const char *in, char *out, u32 width, u32 height)