xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

OMAP: DSS2: OMAPFB: Convert the memory region locking to rwsem

Browse Source 
R/W semaphore is a good fit for the memory region locking pattern.
So use it.

Signed-off-by: Ville Syrjälä <ville.syrjala@nokia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
This commit is contained in:
Ville Syrjälä
2010-03-17 20:58:03 +02:00
committed by Tomi Valkeinen
parent 430571d59a
commit 2f642a1750
4 changed files with 10 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/video/omap2/omapfb/omapfb-ioctl.c
View File

@@ -198,13 +198,7 @@ static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
rg = ofbi->region;
/* FIXME probably should be a rwsem ... */
mutex_lock(&rg->mtx);
while (rg->ref) {
mutex_unlock(&rg->mtx);
schedule();
mutex_lock(&rg->mtx);
}
down_write(&rg->lock);
if (atomic_read(&rg->map_count)) {
r = -EBUSY;
@@ -235,7 +229,7 @@ static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
}
out:
mutex_unlock(&rg->mtx);
up_write(&rg->lock);
return r;
}