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authorJan Kara <jack@suse.cz>2017-04-12 12:24:25 +0200
committerJens Axboe <axboe@fb.com>2017-04-20 12:09:55 -0600
commitbaf7a616d537f577d33b7d9986f40532e2bd9f66 (patch)
tree3eaedfef1afdc00ab57824802669d0f3f5a70d5e /mm
parentblk-throttle: fix unused variable warning with BLK_DEV_THROTTLING_LOW=n (diff)
downloadlinux-dev-baf7a616d537f577d33b7d9986f40532e2bd9f66.tar.xz
linux-dev-baf7a616d537f577d33b7d9986f40532e2bd9f66.zip
bdi: Provide bdi_register_va() and bdi_alloc()
Add function that registers bdi and takes va_list instead of variable number of arguments. Add bdi_alloc() as simple wrapper for NUMA-unaware users allocating BDI. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to '')
-rw-r--r--mm/backing-dev.c20
1 files changed, 15 insertions, 5 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 3ea3bbd921d6..e5e0972bdd6f 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -856,18 +856,15 @@ struct backing_dev_info *bdi_alloc_node(gfp_t gfp_mask, int node_id)
return bdi;
}
-int bdi_register(struct backing_dev_info *bdi, struct device *parent,
- const char *fmt, ...)
+int bdi_register_va(struct backing_dev_info *bdi, struct device *parent,
+ const char *fmt, va_list args)
{
- va_list args;
struct device *dev;
if (bdi->dev) /* The driver needs to use separate queues per device */
return 0;
- va_start(args, fmt);
dev = device_create_vargs(bdi_class, parent, MKDEV(0, 0), bdi, fmt, args);
- va_end(args);
if (IS_ERR(dev))
return PTR_ERR(dev);
@@ -884,6 +881,19 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent,
trace_writeback_bdi_register(bdi);
return 0;
}
+EXPORT_SYMBOL(bdi_register_va);
+
+int bdi_register(struct backing_dev_info *bdi, struct device *parent,
+ const char *fmt, ...)
+{
+ va_list args;
+ int ret;
+
+ va_start(args, fmt);
+ ret = bdi_register_va(bdi, parent, fmt, args);
+ va_end(args);
+ return ret;
+}
EXPORT_SYMBOL(bdi_register);
int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev)