Messages in this thread Patch in this message | | | Date | Sat, 25 Dec 2010 20:27:01 +0100 (CET) | From | Jesper Juhl <> | Subject | [PATCH] befs: Don't pass huge structs by value. |
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Hi there,
'struct befs_disk_data_stream' is huge (~144 bytes) and it's being passed by value in fs/befs/endian.h::cpu_to_fsrun().
It seems to me that it would be better to pass a pointer, no? This patch changes the function to take a pointer to the large struct.
Signed-off-by: Jesper Juhl <jj@chaosbits.net> --- endian.h | 16 ++++++++-------- linuxvfs.c | 2 +- 2 files changed, 9 insertions(+), 9 deletions(-)
Compile tested only. I have no way to test this.
diff --git a/fs/befs/endian.h b/fs/befs/endian.h index 6cb84d8..a99caa0 100644 --- a/fs/befs/endian.h +++ b/fs/befs/endian.h @@ -102,22 +102,22 @@ cpu_to_fsrun(const struct super_block *sb, befs_block_run n) } static inline befs_data_stream -fsds_to_cpu(const struct super_block *sb, befs_disk_data_stream n) +fsds_to_cpu(const struct super_block *sb, befs_disk_data_stream *n) { befs_data_stream data; int i; for (i = 0; i < BEFS_NUM_DIRECT_BLOCKS; ++i) - data.direct[i] = fsrun_to_cpu(sb, n.direct[i]); + data.direct[i] = fsrun_to_cpu(sb, n->direct[i]); - data.max_direct_range = fs64_to_cpu(sb, n.max_direct_range); - data.indirect = fsrun_to_cpu(sb, n.indirect); - data.max_indirect_range = fs64_to_cpu(sb, n.max_indirect_range); - data.double_indirect = fsrun_to_cpu(sb, n.double_indirect); + data.max_direct_range = fs64_to_cpu(sb, n->max_direct_range); + data.indirect = fsrun_to_cpu(sb, n->indirect); + data.max_indirect_range = fs64_to_cpu(sb, n->max_indirect_range); + data.double_indirect = fsrun_to_cpu(sb, n->double_indirect); data.max_double_indirect_range = fs64_to_cpu(sb, - n. + n-> max_double_indirect_range); - data.size = fs64_to_cpu(sb, n.size); + data.size = fs64_to_cpu(sb, n->size); return data; } diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c index aa4e7c7..d5fbc09 100644 --- a/fs/befs/linuxvfs.c +++ b/fs/befs/linuxvfs.c @@ -384,7 +384,7 @@ static struct inode *befs_iget(struct super_block *sb, unsigned long ino) int num_blks; befs_ino->i_data.ds = - fsds_to_cpu(sb, raw_inode->data.datastream); + fsds_to_cpu(sb, &raw_inode->data.datastream); num_blks = befs_count_blocks(sb, &befs_ino->i_data.ds); inode->i_blocks =
-- Jesper Juhl <jj@chaosbits.net> http://www.chaosbits.net/ Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html Plain text mails only, please.
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