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authorLinus Torvalds <torvalds@linux-foundation.org>2017-05-12 15:43:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-12 15:43:10 -0700
commit0fcc3ab23d7395f58e8ab0834e7913e2e4314a83 (patch)
treeebd4745696ad330e2da6873cea158d9d56aa661d /include
parentdeac8429d62ca19c1571853e2a18f60e760ee04c (diff)
parente84b83b9ee2187817cf895471675f1ccdf64cd53 (diff)
Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams: "Incremental fixes and a small feature addition on top of the main libnvdimm 4.12 pull request: - Geert noticed that tinyconfig was bloated by BLOCK selecting DAX. The size regression is fixed by moving all dax helpers into the dax-core and only specifying "select DAX" for FS_DAX and dax-capable drivers. He also asked for clarification of the NR_DEV_DAX config option which, on closer look, does not need to be a config option at all. Mike also throws in a DEV_DAX_PMEM fixup for good measure. - Ben's attention to detail on -stable patch submissions caught a case where the recent fixes to arch_copy_from_iter_pmem() missed a condition where we strand dirty data in the cache. This is tagged for -stable and will also be included in the rework of the pmem api to a proposed {memcpy,copy_user}_flushcache() interface for 4.13. - Vishal adds a feature that missed the initial pull due to pending review feedback. It allows the kernel to clear media errors when initializing a BTT (atomic sector update driver) instance on a pmem namespace. - Ross noticed that the dax_device + dax_operations conversion broke __dax_zero_page_range(). The nvdimm unit tests fail to check this path, but xfstests immediately trips over it. No excuse for missing this before submitting the 4.12 pull request. These all pass the nvdimm unit tests and an xfstests spot check. The set has received a build success notification from the kbuild robot" * 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: filesystem-dax: fix broken __dax_zero_page_range() conversion libnvdimm, btt: ensure that initializing metadata clears poison libnvdimm: add an atomic vs process context flag to rw_bytes x86, pmem: Fix cache flushing for iovec write < 8 bytes device-dax: kill NR_DEV_DAX block, dax: move "select DAX" from BLOCK to FS_DAX device-dax: Tell kbuild DEV_DAX_PMEM depends on DEV_DAX
Diffstat (limited to 'include')
-rw-r--r--include/linux/blkdev.h2
-rw-r--r--include/linux/dax.h30
-rw-r--r--include/linux/nd.h12
3 files changed, 35 insertions, 9 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index b5d1e27631ee..ab92c4ea138b 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1947,8 +1947,6 @@ extern int __blkdev_driver_ioctl(struct block_device *, fmode_t, unsigned int,
extern int bdev_read_page(struct block_device *, sector_t, struct page *);
extern int bdev_write_page(struct block_device *, sector_t, struct page *,
struct writeback_control *);
-extern int bdev_dax_supported(struct super_block *, int);
-int bdev_dax_pgoff(struct block_device *, sector_t, size_t, pgoff_t *pgoff);
#else /* CONFIG_BLOCK */
struct block_device;
diff --git a/include/linux/dax.h b/include/linux/dax.h
index d3158e74a59e..7fdf1d710042 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -18,12 +18,38 @@ struct dax_operations {
void **, pfn_t *);
};
+int bdev_dax_pgoff(struct block_device *, sector_t, size_t, pgoff_t *pgoff);
+#if IS_ENABLED(CONFIG_FS_DAX)
+int __bdev_dax_supported(struct super_block *sb, int blocksize);
+static inline int bdev_dax_supported(struct super_block *sb, int blocksize)
+{
+ return __bdev_dax_supported(sb, blocksize);
+}
+#else
+static inline int bdev_dax_supported(struct super_block *sb, int blocksize)
+{
+ return -EOPNOTSUPP;
+}
+#endif
+
+#if IS_ENABLED(CONFIG_DAX)
+struct dax_device *dax_get_by_host(const char *host);
+void put_dax(struct dax_device *dax_dev);
+#else
+static inline struct dax_device *dax_get_by_host(const char *host)
+{
+ return NULL;
+}
+
+static inline void put_dax(struct dax_device *dax_dev)
+{
+}
+#endif
+
int dax_read_lock(void);
void dax_read_unlock(int id);
-struct dax_device *dax_get_by_host(const char *host);
struct dax_device *alloc_dax(void *private, const char *host,
const struct dax_operations *ops);
-void put_dax(struct dax_device *dax_dev);
bool dax_alive(struct dax_device *dax_dev);
void kill_dax(struct dax_device *dax_dev);
void *dax_get_private(struct dax_device *dax_dev);
diff --git a/include/linux/nd.h b/include/linux/nd.h
index fa66aeed441a..194b8e002ea7 100644
--- a/include/linux/nd.h
+++ b/include/linux/nd.h
@@ -48,7 +48,7 @@ struct nd_namespace_common {
struct device dev;
struct device *claim;
int (*rw_bytes)(struct nd_namespace_common *, resource_size_t offset,
- void *buf, size_t size, int rw);
+ void *buf, size_t size, int rw, unsigned long flags);
};
static inline struct nd_namespace_common *to_ndns(struct device *dev)
@@ -134,9 +134,10 @@ static inline struct nd_namespace_blk *to_nd_namespace_blk(const struct device *
* @buf is up-to-date upon return from this routine.
*/
static inline int nvdimm_read_bytes(struct nd_namespace_common *ndns,
- resource_size_t offset, void *buf, size_t size)
+ resource_size_t offset, void *buf, size_t size,
+ unsigned long flags)
{
- return ndns->rw_bytes(ndns, offset, buf, size, READ);
+ return ndns->rw_bytes(ndns, offset, buf, size, READ, flags);
}
/**
@@ -152,9 +153,10 @@ static inline int nvdimm_read_bytes(struct nd_namespace_common *ndns,
* to media is handled internal to the @ndns driver, if at all.
*/
static inline int nvdimm_write_bytes(struct nd_namespace_common *ndns,
- resource_size_t offset, void *buf, size_t size)
+ resource_size_t offset, void *buf, size_t size,
+ unsigned long flags)
{
- return ndns->rw_bytes(ndns, offset, buf, size, WRITE);
+ return ndns->rw_bytes(ndns, offset, buf, size, WRITE, flags);
}
#define MODULE_ALIAS_ND_DEVICE(type) \