diff options
Diffstat (limited to 'linux-core/drm_bufs.c')
| -rw-r--r-- | linux-core/drm_bufs.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/linux-core/drm_bufs.c b/linux-core/drm_bufs.c index f310eced..d3ca48b4 100644 --- a/linux-core/drm_bufs.c +++ b/linux-core/drm_bufs.c @@ -768,18 +768,34 @@ int DRM(mapbufs)( struct inode *inode, struct file *filp, goto done; } +#if LINUX_VERSION_CODE < 0x020402 + down( ¤t->mm->mmap_sem ); +#else down_write( ¤t->mm->mmap_sem ); +#endif virtual = do_mmap( filp, 0, map->size, PROT_READ | PROT_WRITE, MAP_SHARED, (unsigned long)map->offset ); +#if LINUX_VERSION_CODE < 0x020402 + up( ¤t->mm->mmap_sem ); +#else up_write( ¤t->mm->mmap_sem ); +#endif } else { +#if LINUX_VERSION_CODE < 0x020402 + down( ¤t->mm->mmap_sem ); +#else down_write( ¤t->mm->mmap_sem ); +#endif virtual = do_mmap( filp, 0, dma->byte_count, PROT_READ | PROT_WRITE, MAP_SHARED, 0 ); +#if LINUX_VERSION_CODE < 0x020402 + up( ¤t->mm->mmap_sem ); +#else up_write( ¤t->mm->mmap_sem ); +#endif } if ( virtual > -1024UL ) { /* Real error */ |