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authorChristoph Hellwig <hch@lst.de>2019-04-05 18:08:59 +0200
committerJens Axboe <axboe@kernel.dk>2019-04-06 10:48:35 -0600
commit72deb455b5ec619ff043c30bc90025aa3de3cdda (patch)
tree8c2a77bc41d25181e03da1f04068be12a4c0583c /fs/xfs
parent75199aa5269f66d0958aa9971fa81a92de83d7f9 (diff)
downloadlinux-72deb455b5ec619ff043c30bc90025aa3de3cdda.tar.bz2
block: remove CONFIG_LBDAF
Currently support for 64-bit sector_t and blkcnt_t is optional on 32-bit architectures. These types are required to support block device and/or file sizes larger than 2 TiB, and have generally defaulted to on for a long time. Enabling the option only increases the i386 tinyconfig size by 145 bytes, and many data structures already always use 64-bit values for their in-core and on-disk data structures anyway, so there should not be a large change in dynamic memory usage either. Dropping this option removes a somewhat weird non-default config that has cause various bugs or compiler warnings when actually used. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/Kconfig1
-rw-r--r--fs/xfs/xfs_super.c10
2 files changed, 1 insertions, 10 deletions
diff --git a/fs/xfs/Kconfig b/fs/xfs/Kconfig
index 457ac9f97377..99af5e5bda9f 100644
--- a/fs/xfs/Kconfig
+++ b/fs/xfs/Kconfig
@@ -1,7 +1,6 @@
config XFS_FS
tristate "XFS filesystem support"
depends on BLOCK
- depends on (64BIT || LBDAF)
select EXPORTFS
select LIBCRC32C
select FS_IOMAP
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index f093ea244849..703b6be063ef 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -539,26 +539,18 @@ xfs_max_file_offset(
/* Figure out maximum filesize, on Linux this can depend on
* the filesystem blocksize (on 32 bit platforms).
- * __block_write_begin does this in an [unsigned] long...
+ * __block_write_begin does this in an [unsigned] long long...
* page->index << (PAGE_SHIFT - bbits)
* So, for page sized blocks (4K on 32 bit platforms),
* this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
* (((u64)PAGE_SIZE << (BITS_PER_LONG-1))-1)
* but for smaller blocksizes it is less (bbits = log2 bsize).
- * Note1: get_block_t takes a long (implicit cast from above)
- * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
- * can optionally convert the [unsigned] long from above into
- * an [unsigned] long long.
*/
#if BITS_PER_LONG == 32
-# if defined(CONFIG_LBDAF)
ASSERT(sizeof(sector_t) == 8);
pagefactor = PAGE_SIZE;
bitshift = BITS_PER_LONG;
-# else
- pagefactor = PAGE_SIZE >> (PAGE_SHIFT - blockshift);
-# endif
#endif
return (((uint64_t)pagefactor) << bitshift) - 1;