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path: root/fs/btrfs/struct-funcs.c (follow)
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2012-07-23Btrfs: rewrite BTRFS_SETGET_FUNCSLi Zefan1-97/+99
BTRFS_SETGET_FUNCS macro is used to generate btrfs_set_foo() and btrfs_foo() functions, which read and write specific fields in the extent buffer. The total number of set/get functions is ~200, but in fact we only need 8 functions: 2 for u8 field, 2 for u16, 2 for u32 and 2 for u64. It results in redunction of ~37K bytes. text data bss dec hex filename 629661 12489 216 642366 9cd3e fs/btrfs/btrfs.o.orig 592637 12489 216 605342 93c9e fs/btrfs/btrfs.o Signed-off-by: Li Zefan <lizefan@huawei.com>
2012-03-26Btrfs: add the ability to cache a pointer into the ebChris Mason1-7/+46
This cuts down on the CPU time used by map_private_extent_buffer Signed-off-by: Chris Mason <chris.mason@oracle.com>
2011-07-27Btrfs: stop using highmem for extent_buffersChris Mason1-69/+31
The extent_buffers have a very complex interface where we use HIGHMEM for metadata and try to cache a kmap mapping to access the memory. The next commit adds reader/writer locks, and concurrent use of this kmap cache would make it even more complex. This commit drops the ability to use HIGHMEM with extent buffers, and rips out all of the related code. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2009-01-05Btrfs: Fix checkpatch.pl warningsChris Mason1-2/+2
There were many, most are fixed now. struct-funcs.c generates some warnings but these are bogus. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-12-02Btrfs: Fix sparse endian warnings in struct-funcs.cChris Mason1-5/+12
The btrfs macros to access individual struct members on disk were sending the same variable to functions that expected different types of endianness. This fix explicitly creates a variable of the correct type instead of abusing a single variable for mixed purposes. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-29Btrfs: add and improve commentsChris Mason1-0/+21
This improves the comments at the top of many functions. It didn't dive into the guts of functions because I was trying to avoid merging problems with the new allocator and back reference work. extent-tree.c and volumes.c were both skipped, and there is definitely more work todo in cleaning and commenting the code. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Btrfs: unaligned access fixesDavid Miller1-16/+14
Btrfs set/get macros lose type information needed to avoid unaligned accesses on sparc64. ere is a patch for the kernel bits which fixes most of the unaligned accesses on sparc64. btrfs_name_hash is modified to return the hash value instead of getting a return location via a (potentially unaligned) pointer. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Fix recursive KM_USER1 usage in btrfs_realloc_nodeChris Mason1-0/+16
Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25Breakout BTRFS_SETGET_FUNCS into a separate C file, the inlines were too big.Chris Mason1-0/+97
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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