linux.git/fs/btrfs/struct-funcs.c, branch v5.7

btrfs: tie extent buffer and it's token together

2019-09-09T12:59:16+00:00

Further simplifaction of the get/set helpers is possible when the token
is uniquely tied to an extent buffer. A condition and an assignment can
be avoided.

The initializations are moved closer to the first use when the extent
buffer is valid. There's one exception in __push_leaf_left where the
token is reused.

Signed-off-by: David Sterba

btrfs: assume valid token for btrfs_set/get_token helpers

2019-09-09T12:59:16+00:00

Now that we can safely assume that the token is always a valid pointer,
remove the branches that check that.

Signed-off-by: David Sterba

btrfs: define separate btrfs_set/get_XX helpers

2019-09-09T12:59:16+00:00

There are helpers for all type widths defined via macro and optionally
can use a token which is a cached pointer to avoid repeated mapping of
the extent buffer.

The token value is known at compile time, when it's valid it's always
address of a local variable, otherwise it's NULL passed by the
token-less helpers.

This can be utilized to remove some branching as the helpers are used
frequenlty.

Signed-off-by: David Sterba

btrfs: prune unused includes

2018-08-06T11:12:43+00:00

Remove includes if none of the interfaces and exports is used in the
given source file.

Signed-off-by: David Sterba

btrfs: replace GPL boilerplate by SPDX -- sources

2018-04-12T14:29:51+00:00

Remove GPL boilerplate text (long, short, one-line) and keep the rest,
ie. personal, company or original source copyright statements. Add the
SPDX header.

Signed-off-by: David Sterba

btrfs: struct-funcs, constify readers

2017-08-16T12:19:53+00:00

We have reader helpers for most of the on-disk structures that use
an extent_buffer and pointer as offset into the buffer that are
read-only.  We should mark them as const and, in turn, allow consumers
of these interfaces to mark the buffers const as well.

No impact on code, but serves as documentation that a buffer is intended
not to be modified.

Signed-off-by: Jeff Mahoney 
Signed-off-by: David Sterba

btrfs: fix string and comment grammatical issues and typos

2016-05-25T20:35:14+00:00

Signed-off-by: Nicholas D Steeves 
Signed-off-by: David Sterba

mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage

2016-04-04T17:41:08+00:00

Mostly direct substitution with occasional adjustment or removing
outdated comments.

Signed-off-by: Kirill A. Shutemov 
Acked-by: Michal Hocko 
Signed-off-by: Linus Torvalds

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