The patch titled
Subject: dax: guarantee page aligned results from bdev_direct_access()
has been removed from the -mm tree. Its filename was
dax-guarantee-page-aligned-results-from-bdev_direct_access.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Dan Williams <dan.j.williams@xxxxxxxxx>
Subject: dax: guarantee page aligned results from bdev_direct_access()
If a ->direct_access() implementation ever returns a map count less than
PAGE_SIZE, catch the error in bdev_direct_access(). This simplifies error
checking in upper layers.
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Reported-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/block_dev.c | 2 ++
fs/dax.c | 1 -
2 files changed, 2 insertions(+), 1 deletion(-)
diff -puN fs/block_dev.c~dax-guarantee-page-aligned-results-from-bdev_direct_access fs/block_dev.c
--- a/fs/block_dev.c~dax-guarantee-page-aligned-results-from-bdev_direct_access
+++ a/fs/block_dev.c
@@ -494,6 +494,8 @@ long bdev_direct_access(struct block_dev
avail = ops->direct_access(bdev, sector, addr, pfn);
if (!avail)
return -ERANGE;
+ if (avail > 0 && avail & ~PAGE_MASK)
+ return -ENXIO;
return min(avail, size);
}
EXPORT_SYMBOL_GPL(bdev_direct_access);
diff -puN fs/dax.c~dax-guarantee-page-aligned-results-from-bdev_direct_access fs/dax.c
--- a/fs/dax.c~dax-guarantee-page-aligned-results-from-bdev_direct_access
+++ a/fs/dax.c
@@ -52,7 +52,6 @@ int dax_clear_blocks(struct inode *inode
sz = min_t(long, count, SZ_128K);
clear_pmem(addr, sz);
size -= sz;
- BUG_ON(sz & 511);
sector += sz / 512;
cond_resched();
} while (size);
_
Patches currently in -mm which might be from dan.j.williams@xxxxxxxxx are
dax-add-support-for-fsync-sync-v6-fix.patch
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