linux.git/fs/btrfs/struct-funcs.c, branch v4.5

Btrfs: rewrite BTRFS_SETGET_FUNCS

2012-07-23T20:28:06+00:00

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

Btrfs: add the ability to cache a pointer into the eb

2012-03-26T21:04:23+00:00

This cuts down on the CPU time used by map_private_extent_buffer

Signed-off-by: Chris Mason

Btrfs: stop using highmem for extent_buffers

2011-07-27T16:46:45+00:00

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

Btrfs: Fix checkpatch.pl warnings

2009-01-06T02:25:51+00:00

There were many, most are fixed now.  struct-funcs.c generates some warnings
but these are bogus.

Signed-off-by: Chris Mason

Btrfs: Fix sparse endian warnings in struct-funcs.c

2008-12-02T16:18:37+00:00

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

Btrfs: add and improve comments

2008-09-29T19:18:18+00:00

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

Btrfs: unaligned access fixes

2008-09-25T15:04:00+00:00

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

Fix recursive KM_USER1 usage in btrfs_realloc_node

2008-09-25T15:03:57+00:00

Signed-off-by: Chris Mason

Breakout BTRFS_SETGET_FUNCS into a separate C file, the inlines were too big.

2008-09-25T15:03:56+00:00

Signed-off-by: Chris Mason