[PATCH 01/24] block: Provide bdi_alloc()
From: Jan Kara <jack@suse.cz>
Date: 2017-02-02 17:41:26
Also in:
linux-fsdevel
Subsystem:
memory management, memory management - misc, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
Provide bdi_alloc() forsimple allocation of a BDI that can be used by filesystems that don't need anything fancy. We use this function when converting filesystems from embedded struct backing_dev_info into a dynamically allocated one. Signed-off-by: Jan Kara <jack@suse.cz> --- include/linux/backing-dev.h | 1 + mm/backing-dev.c | 15 +++++++++++++++ 2 files changed, 16 insertions(+)
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index c52a48cb9a66..81c07ade4305 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h@@ -37,6 +37,7 @@ void bdi_unregister(struct backing_dev_info *bdi); int __must_check bdi_setup_and_register(struct backing_dev_info *, char *); void bdi_destroy(struct backing_dev_info *bdi); struct backing_dev_info *bdi_alloc_node(gfp_t gfp_mask, int node_id); +struct backing_dev_info *bdi_alloc(gfp_t gfp_mask); void wb_start_writeback(struct bdi_writeback *wb, long nr_pages, bool range_cyclic, enum wb_reason reason);
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 28ce6cf7b2ff..7a5ba4163656 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c@@ -809,6 +809,21 @@ struct backing_dev_info *bdi_alloc_node(gfp_t gfp_mask, int node_id) return bdi; } +struct backing_dev_info *bdi_alloc(gfp_t gfp_mask) +{ + struct backing_dev_info *bdi; + + bdi = kmalloc(sizeof(struct backing_dev_info), gfp_mask | __GFP_ZERO); + if (!bdi) + return NULL; + if (bdi_init(bdi)) { + kfree(bdi); + return NULL; + } + return bdi; +} +EXPORT_SYMBOL(bdi_alloc); + int bdi_register(struct backing_dev_info *bdi, struct device *parent, const char *fmt, ...) {
--
2.10.2