From 5d2a228b9e1319ff188f9ea89006fbe575561921 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 29 Nov 2021 11:21:36 +0100
Subject: [PATCH] dm: make the DAX support depend on CONFIG_FS_DAX
Git-commit: 5d2a228b9e1319ff188f9ea89006fbe575561921
Patch-mainline: v5.17-rc1
References: jsc#PED-2765
The device mapper DAX support is all hanging off a block device and thus
can't be used with device dax. Make it depend on CONFIG_FS_DAX instead
of CONFIG_DAX_DRIVER. This also means that bdev_dax_pgoff only needs to
be built under CONFIG_FS_DAX now.
(Coly Li: rebased for Linux v5.14 based SUSE kernel)
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Link: https://lore.kernel.org/r/20211129102203.2243509-3-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Coly Li <colyli@suse.de>
---
drivers/dax/super.c | 6 ++----
drivers/md/dm-linear.c | 2 +-
drivers/md/dm-log-writes.c | 2 +-
drivers/md/dm-stripe.c | 2 +-
drivers/md/dm-writecache.c | 2 +-
drivers/md/dm.c | 2 +-
6 files changed, 7 insertions(+), 9 deletions(-)
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -40,7 +40,7 @@ void dax_read_unlock(int id)
}
EXPORT_SYMBOL_GPL(dax_read_unlock);
-#ifdef CONFIG_BLOCK
+#if defined(CONFIG_BLOCK) && defined(CONFIG_FS_DAX)
#include <linux/blkdev.h>
int bdev_dax_pgoff(struct block_device *bdev, sector_t sector, size_t size,
@@ -57,7 +57,6 @@ int bdev_dax_pgoff(struct block_device *
}
EXPORT_SYMBOL(bdev_dax_pgoff);
-#if IS_ENABLED(CONFIG_FS_DAX)
struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev)
{
if (!blk_queue_dax(bdev->bd_disk->queue))
@@ -65,7 +64,6 @@ struct dax_device *fs_dax_get_by_bdev(st
return dax_get_by_host(bdev->bd_disk->disk_name);
}
EXPORT_SYMBOL_GPL(fs_dax_get_by_bdev);
-#endif
bool __generic_fsdax_supported(struct dax_device *dax_dev,
struct block_device *bdev, int blocksize, sector_t start,
@@ -197,7 +195,7 @@ bool __bdev_dax_supported(struct block_d
return ret;
}
EXPORT_SYMBOL_GPL(__bdev_dax_supported);
-#endif
+#endif /* CONFIG_BLOCK && CONFIG_FS_DAX */
enum dax_device_flags {
/* !alive + rcu grace period == no new operations / mappings */
--- a/drivers/md/dm-linear.c
+++ b/drivers/md/dm-linear.c
@@ -162,7 +162,7 @@ static int linear_iterate_devices(struct
return fn(ti, lc->dev, lc->start, ti->len, data);
}
-#if IS_ENABLED(CONFIG_DAX_DRIVER)
+#if IS_ENABLED(CONFIG_FS_DAX)
static long linear_dax_direct_access(struct dm_target *ti, pgoff_t pgoff,
long nr_pages, void **kaddr, pfn_t *pfn)
{
--- a/drivers/md/dm-log-writes.c
+++ b/drivers/md/dm-log-writes.c
@@ -901,7 +901,7 @@ static void log_writes_io_hints(struct d
limits->io_min = limits->physical_block_size;
}
-#if IS_ENABLED(CONFIG_DAX_DRIVER)
+#if IS_ENABLED(CONFIG_FS_DAX)
static int log_dax(struct log_writes_c *lc, sector_t sector, size_t bytes,
struct iov_iter *i)
{
--- a/drivers/md/dm-stripe.c
+++ b/drivers/md/dm-stripe.c
@@ -300,7 +300,7 @@ static int stripe_map(struct dm_target *
return DM_MAPIO_REMAPPED;
}
-#if IS_ENABLED(CONFIG_DAX_DRIVER)
+#if IS_ENABLED(CONFIG_FS_DAX)
static long stripe_dax_direct_access(struct dm_target *ti, pgoff_t pgoff,
long nr_pages, void **kaddr, pfn_t *pfn)
{
--- a/drivers/md/dm-writecache.c
+++ b/drivers/md/dm-writecache.c
@@ -38,7 +38,7 @@
#define BITMAP_GRANULARITY PAGE_SIZE
#endif
-#if IS_ENABLED(CONFIG_ARCH_HAS_PMEM_API) && IS_ENABLED(CONFIG_DAX_DRIVER)
+#if IS_ENABLED(CONFIG_ARCH_HAS_PMEM_API) && IS_ENABLED(CONFIG_FS_DAX)
#define DM_WRITECACHE_HAS_PMEM
#endif
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1784,7 +1784,7 @@ static struct mapped_device *alloc_dev(i
md->disk->private_data = md;
sprintf(md->disk->disk_name, "dm-%d", minor);
- if (IS_ENABLED(CONFIG_DAX_DRIVER)) {
+ if (IS_ENABLED(CONFIG_FS_DAX)) {
md->dax_dev = alloc_dax(md, md->disk->disk_name,
&dm_dax_ops, 0);
if (IS_ERR(md->dax_dev)) {