mm/backing-dev.c: use might_alloc()

Now that my little helper has landed, use it more.  On top of the existing
check this also uses lockdep through the fs_reclaim annotations.

[akpm@linux-foundation.org: include linux/sched/mm.h]

Link: https://lkml.kernel.org/r/20210113135009.3606813-2-daniel.vetter@ffwll.ch
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index eca555f..576220a 100644 (file)
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -8,6 +8,7 @@
 #include <linux/fs.h>
 #include <linux/pagemap.h>
 #include <linux/mm.h>
+#include <linux/sched/mm.h>
 #include <linux/sched.h>
 #include <linux/module.h>
 #include <linux/writeback.h>
@@ -578,7 +579,7 @@ struct bdi_writeback *wb_get_create(struct backing_dev_info *bdi,
 {
        struct bdi_writeback *wb;
 
-       might_sleep_if(gfpflags_allow_blocking(gfp));
+       might_alloc(gfp);
 
        if (!memcg_css->parent)
                return &bdi->wb;