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authorLinus Torvalds <torvalds@linux-foundation.org>2017-05-01 10:39:57 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-01 10:39:57 -0700
commit694752922b12bd318aa80191bd9d8c3dcfb39055 (patch)
tree5afe83fd99100bea546dd5a1c1f778c58f41e5c0 /drivers/mtd
parenta351e9b9fc24e982ec2f0e76379a49826036da12 (diff)
parent9438b3e080beccf6022138ea62192d55cc7dc4ed (diff)
downloadlinux-694752922b12bd318aa80191bd9d8c3dcfb39055.tar.bz2
Merge branch 'for-4.12/block' of git://git.kernel.dk/linux-block
Pull block layer updates from Jens Axboe: - Add BFQ IO scheduler under the new blk-mq scheduling framework. BFQ was initially a fork of CFQ, but subsequently changed to implement fairness based on B-WF2Q+, a modified variant of WF2Q. BFQ is meant to be used on desktop type single drives, providing good fairness. From Paolo. - Add Kyber IO scheduler. This is a full multiqueue aware scheduler, using a scalable token based algorithm that throttles IO based on live completion IO stats, similary to blk-wbt. From Omar. - A series from Jan, moving users to separately allocated backing devices. This continues the work of separating backing device life times, solving various problems with hot removal. - A series of updates for lightnvm, mostly from Javier. Includes a 'pblk' target that exposes an open channel SSD as a physical block device. - A series of fixes and improvements for nbd from Josef. - A series from Omar, removing queue sharing between devices on mostly legacy drivers. This helps us clean up other bits, if we know that a queue only has a single device backing. This has been overdue for more than a decade. - Fixes for the blk-stats, and improvements to unify the stats and user windows. This both improves blk-wbt, and enables other users to register a need to receive IO stats for a device. From Omar. - blk-throttle improvements from Shaohua. This provides a scalable framework for implementing scalable priotization - particularly for blk-mq, but applicable to any type of block device. The interface is marked experimental for now. - Bucketized IO stats for IO polling from Stephen Bates. This improves efficiency of polled workloads in the presence of mixed block size IO. - A few fixes for opal, from Scott. - A few pulls for NVMe, including a lot of fixes for NVMe-over-fabrics. From a variety of folks, mostly Sagi and James Smart. - A series from Bart, improving our exposed info and capabilities from the blk-mq debugfs support. - A series from Christoph, cleaning up how handle WRITE_ZEROES. - A series from Christoph, cleaning up the block layer handling of how we track errors in a request. On top of being a nice cleanup, it also shrinks the size of struct request a bit. - Removal of mg_disk and hd (sorry Linus) by Christoph. The former was never used by platforms, and the latter has outlived it's usefulness. - Various little bug fixes and cleanups from a wide variety of folks. * 'for-4.12/block' of git://git.kernel.dk/linux-block: (329 commits) block: hide badblocks attribute by default blk-mq: unify hctx delay_work and run_work block: add kblock_mod_delayed_work_on() blk-mq: unify hctx delayed_run_work and run_work nbd: fix use after free on module unload MAINTAINERS: bfq: Add Paolo as maintainer for the BFQ I/O scheduler blk-mq-sched: alloate reserved tags out of normal pool mtip32xx: use runtime tag to initialize command header scsi: Implement blk_mq_ops.show_rq() blk-mq: Add blk_mq_ops.show_rq() blk-mq: Show operation, cmd_flags and rq_flags names blk-mq: Make blk_flags_show() callers append a newline character blk-mq: Move the "state" debugfs attribute one level down blk-mq: Unregister debugfs attributes earlier blk-mq: Only unregister hctxs for which registration succeeded blk-mq-debugfs: Rename functions for registering and unregistering the mq directory blk-mq: Let blk_mq_debugfs_register() look up the queue name blk-mq: Register <dev>/queue/mq after having registered <dev>/queue ide-pm: always pass 0 error to ide_complete_rq in ide_do_devset ide-pm: always pass 0 error to __blk_end_request_all ..
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/mtdcore.c23
-rw-r--r--drivers/mtd/mtdsuper.c6
-rw-r--r--drivers/mtd/ubi/block.c2
3 files changed, 18 insertions, 13 deletions
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index 66a9dedd1062..1517da3ddd7d 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -46,7 +46,7 @@
#include "mtdcore.h"
-static struct backing_dev_info *mtd_bdi;
+struct backing_dev_info *mtd_bdi;
#ifdef CONFIG_PM_SLEEP
@@ -496,11 +496,9 @@ int add_mtd_device(struct mtd_info *mtd)
* mtd_device_parse_register() multiple times on the same master MTD,
* especially with CONFIG_MTD_PARTITIONED_MASTER=y.
*/
- if (WARN_ONCE(mtd->backing_dev_info, "MTD already registered\n"))
+ if (WARN_ONCE(mtd->dev.type, "MTD already registered\n"))
return -EEXIST;
- mtd->backing_dev_info = mtd_bdi;
-
BUG_ON(mtd->writesize == 0);
mutex_lock(&mtd_table_mutex);
@@ -1775,13 +1773,18 @@ static struct backing_dev_info * __init mtd_bdi_init(char *name)
struct backing_dev_info *bdi;
int ret;
- bdi = kzalloc(sizeof(*bdi), GFP_KERNEL);
+ bdi = bdi_alloc(GFP_KERNEL);
if (!bdi)
return ERR_PTR(-ENOMEM);
- ret = bdi_setup_and_register(bdi, name);
+ bdi->name = name;
+ /*
+ * We put '-0' suffix to the name to get the same name format as we
+ * used to get. Since this is called only once, we get a unique name.
+ */
+ ret = bdi_register(bdi, "%.28s-0", name);
if (ret)
- kfree(bdi);
+ bdi_put(bdi);
return ret ? ERR_PTR(ret) : bdi;
}
@@ -1813,8 +1816,7 @@ static int __init init_mtd(void)
out_procfs:
if (proc_mtd)
remove_proc_entry("mtd", NULL);
- bdi_destroy(mtd_bdi);
- kfree(mtd_bdi);
+ bdi_put(mtd_bdi);
err_bdi:
class_unregister(&mtd_class);
err_reg:
@@ -1828,8 +1830,7 @@ static void __exit cleanup_mtd(void)
if (proc_mtd)
remove_proc_entry("mtd", NULL);
class_unregister(&mtd_class);
- bdi_destroy(mtd_bdi);
- kfree(mtd_bdi);
+ bdi_put(mtd_bdi);
idr_destroy(&mtd_idr);
}
diff --git a/drivers/mtd/mtdsuper.c b/drivers/mtd/mtdsuper.c
index 20c02a3b7417..e43fea896d1e 100644
--- a/drivers/mtd/mtdsuper.c
+++ b/drivers/mtd/mtdsuper.c
@@ -18,6 +18,7 @@
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/major.h>
+#include <linux/backing-dev.h>
/*
* compare superblocks to see if they're equivalent
@@ -38,6 +39,8 @@ static int get_sb_mtd_compare(struct super_block *sb, void *_mtd)
return 0;
}
+extern struct backing_dev_info *mtd_bdi;
+
/*
* mark the superblock by the MTD device it is using
* - set the device number to be the correct MTD block device for pesuperstence
@@ -49,7 +52,8 @@ static int get_sb_mtd_set(struct super_block *sb, void *_mtd)
sb->s_mtd = mtd;
sb->s_dev = MKDEV(MTD_BLOCK_MAJOR, mtd->index);
- sb->s_bdi = mtd->backing_dev_info;
+ sb->s_bdi = bdi_get(mtd_bdi);
+
return 0;
}
diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
index c80869e60909..51f2be8889b5 100644
--- a/drivers/mtd/ubi/block.c
+++ b/drivers/mtd/ubi/block.c
@@ -347,7 +347,7 @@ static int ubiblock_init_request(void *data, struct request *req,
return 0;
}
-static struct blk_mq_ops ubiblock_mq_ops = {
+static const struct blk_mq_ops ubiblock_mq_ops = {
.queue_rq = ubiblock_queue_rq,
.init_request = ubiblock_init_request,
};