From e299dd4d7c5f38a24045e0578049d872b62f21eb Mon Sep 17 00:00:00 2001 From: Dave Jones Date: Tue, 3 Oct 2006 01:14:47 -0700 Subject: [PATCH] fbcon: Use persistent allocation for cursor blinking Every time the console cursor blinks, we do a kmalloc/kfree pair. This patch turns that into a single allocation. This allocation was the most frequent kmalloc I saw on my test box. [adaplas] Per Alan's suggestion, move global variables to fbcon's private structure. This would also avoid resource leaks when fbcon is unloaded. Signed-off-by: Dave Jones Acked-by: Alan Cox Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/console/softcursor.c | 31 +++++++++++++++++++++---------- 1 file changed, 21 insertions(+), 10 deletions(-) (limited to 'drivers/video/console/softcursor.c') diff --git a/drivers/video/console/softcursor.c b/drivers/video/console/softcursor.c index 557c563e4ae..7d07d838356 100644 --- a/drivers/video/console/softcursor.c +++ b/drivers/video/console/softcursor.c @@ -20,11 +20,12 @@ int soft_cursor(struct fb_info *info, struct fb_cursor *cursor) { + struct fbcon_ops *ops = info->fbcon_par; unsigned int scan_align = info->pixmap.scan_align - 1; unsigned int buf_align = info->pixmap.buf_align - 1; unsigned int i, size, dsize, s_pitch, d_pitch; struct fb_image *image; - u8 *dst, *src; + u8 *dst; if (info->state != FBINFO_STATE_RUNNING) return 0; @@ -32,11 +33,19 @@ int soft_cursor(struct fb_info *info, struct fb_cursor *cursor) s_pitch = (cursor->image.width + 7) >> 3; dsize = s_pitch * cursor->image.height; - src = kmalloc(dsize + sizeof(struct fb_image), GFP_ATOMIC); - if (!src) - return -ENOMEM; + if (dsize + sizeof(struct fb_image) != ops->cursor_size) { + if (ops->cursor_src != NULL) + kfree(ops->cursor_src); + ops->cursor_size = dsize + sizeof(struct fb_image); - image = (struct fb_image *) (src + dsize); + ops->cursor_src = kmalloc(ops->cursor_size, GFP_ATOMIC); + if (!ops->cursor_src) { + ops->cursor_size = 0; + return -ENOMEM; + } + } + + image = (struct fb_image *) (ops->cursor_src + dsize); *image = cursor->image; d_pitch = (s_pitch + scan_align) & ~scan_align; @@ -48,21 +57,23 @@ int soft_cursor(struct fb_info *info, struct fb_cursor *cursor) switch (cursor->rop) { case ROP_XOR: for (i = 0; i < dsize; i++) - src[i] = image->data[i] ^ cursor->mask[i]; + ops->cursor_src[i] = image->data[i] ^ + cursor->mask[i]; break; case ROP_COPY: default: for (i = 0; i < dsize; i++) - src[i] = image->data[i] & cursor->mask[i]; + ops->cursor_src[i] = image->data[i] & + cursor->mask[i]; break; } } else - memcpy(src, image->data, dsize); + memcpy(ops->cursor_src, image->data, dsize); - fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, image->height); + fb_pad_aligned_buffer(dst, d_pitch, ops->cursor_src, s_pitch, + image->height); image->data = dst; info->fbops->fb_imageblit(info, image); - kfree(src); return 0; } -- cgit v1.2.3