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path: root/fs/btrfs/struct-funcs.c (follow)
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2019-09-09btrfs: tie extent buffer and it's token togetherDavid Sterba1-4/+2
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 <dsterba@suse.com>
2019-09-09btrfs: assume valid token for btrfs_set/get_token helpersDavid Sterba1-12/+12
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 <dsterba@suse.com>
2019-09-09btrfs: define separate btrfs_set/get_XX helpersDavid Sterba1-0/+51
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 <dsterba@suse.com>
2018-08-06btrfs: prune unused includesDavid Sterba1-1/+0
Remove includes if none of the interfaces and exports is used in the given source file. Signed-off-by: David Sterba <dsterba@suse.com>
2018-04-12btrfs: replace GPL boilerplate by SPDX -- sourcesDavid Sterba1-14/+1
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 <dsterba@suse.com>
2017-08-16btrfs: struct-funcs, constify readersJeff Mahoney1-4/+5
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 <jeffm@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2016-05-25btrfs: fix string and comment grammatical issues and typosNicholas D Steeves1-1/+1
Signed-off-by: Nicholas D Steeves <nsteeves@gmail.com> Signed-off-by: David Sterba <dsterba@suse.com>
2016-04-04mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usageKirill A. Shutemov1-2/+2
Mostly direct substitution with occasional adjustment or removing outdated comments. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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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