aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorJan Kara <jack@suse.cz>2014-12-18 22:49:12 +0100
committerJan Kara <jack@suse.cz>2014-12-21 22:42:37 +0100
commit3ee3039c5b4d121d56dc6b7deeeee3ba4150a260 (patch)
tree2d9f3b2cc7d489725d93126c3b1ed3c167a87ee5
parente237ec37ec154564f8690c5bd1795339955eeef9 (diff)
udf: Reduce repeated dereferences
Replace repeated dereferences like dir->i_sb by storing superblock pointer in a variable and using that. Signed-off-by: Jan Kara <jack@suse.cz>
-rw-r--r--fs/udf/dir.c32
-rw-r--r--fs/udf/namei.c18
2 files changed, 25 insertions, 25 deletions
diff --git a/fs/udf/dir.c b/fs/udf/dir.c
index a7690b46ce0a..05e90edd1992 100644
--- a/fs/udf/dir.c
+++ b/fs/udf/dir.c
@@ -57,6 +57,7 @@ static int udf_readdir(struct file *file, struct dir_context *ctx)
sector_t offset;
int i, num, ret = 0;
struct extent_position epos = { NULL, 0, {0, 0} };
+ struct super_block *sb = dir->i_sb;
if (ctx->pos == 0) {
if (!dir_emit_dot(file, ctx))
@@ -76,16 +77,16 @@ static int udf_readdir(struct file *file, struct dir_context *ctx)
if (nf_pos == 0)
nf_pos = udf_ext0_offset(dir);
- fibh.soffset = fibh.eoffset = nf_pos & (dir->i_sb->s_blocksize - 1);
+ fibh.soffset = fibh.eoffset = nf_pos & (sb->s_blocksize - 1);
if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
- if (inode_bmap(dir, nf_pos >> dir->i_sb->s_blocksize_bits,
+ if (inode_bmap(dir, nf_pos >> sb->s_blocksize_bits,
&epos, &eloc, &elen, &offset)
!= (EXT_RECORDED_ALLOCATED >> 30)) {
ret = -ENOENT;
goto out;
}
- block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
- if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
+ block = udf_get_lb_pblock(sb, &eloc, offset);
+ if ((++offset << sb->s_blocksize_bits) < elen) {
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
epos.offset -= sizeof(struct short_ad);
else if (iinfo->i_alloc_type ==
@@ -95,18 +96,18 @@ static int udf_readdir(struct file *file, struct dir_context *ctx)
offset = 0;
}
- if (!(fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block))) {
+ if (!(fibh.sbh = fibh.ebh = udf_tread(sb, block))) {
ret = -EIO;
goto out;
}
- if (!(offset & ((16 >> (dir->i_sb->s_blocksize_bits - 9)) - 1))) {
- i = 16 >> (dir->i_sb->s_blocksize_bits - 9);
- if (i + offset > (elen >> dir->i_sb->s_blocksize_bits))
- i = (elen >> dir->i_sb->s_blocksize_bits) - offset;
+ if (!(offset & ((16 >> (sb->s_blocksize_bits - 9)) - 1))) {
+ i = 16 >> (sb->s_blocksize_bits - 9);
+ if (i + offset > (elen >> sb->s_blocksize_bits))
+ i = (elen >> sb->s_blocksize_bits) - offset;
for (num = 0; i > 0; i--) {
- block = udf_get_lb_pblock(dir->i_sb, &eloc, offset + i);
- tmp = udf_tgetblk(dir->i_sb, block);
+ block = udf_get_lb_pblock(sb, &eloc, offset + i);
+ tmp = udf_tgetblk(sb, block);
if (tmp && !buffer_uptodate(tmp) && !buffer_locked(tmp))
bha[num++] = tmp;
else
@@ -152,12 +153,12 @@ static int udf_readdir(struct file *file, struct dir_context *ctx)
}
if ((cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
- if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE))
+ if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
continue;
}
if ((cfi.fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
- if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE))
+ if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
continue;
}
@@ -167,13 +168,12 @@ static int udf_readdir(struct file *file, struct dir_context *ctx)
continue;
}
- flen = udf_get_filename(dir->i_sb, nameptr, lfi, fname,
- UDF_NAME_LEN);
+ flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN);
if (!flen)
continue;
tloc = lelb_to_cpu(cfi.icb.extLocation);
- iblock = udf_get_lb_pblock(dir->i_sb, &tloc, 0);
+ iblock = udf_get_lb_pblock(sb, &tloc, 0);
if (!dir_emit(ctx, fname, flen, iblock, DT_UNKNOWN))
goto out;
} /* end while */
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 6ff19b54b51f..33b246b82c98 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -159,18 +159,19 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
struct udf_inode_info *dinfo = UDF_I(dir);
int isdotdot = child->len == 2 &&
child->name[0] == '.' && child->name[1] == '.';
+ struct super_block *sb = dir->i_sb;
size = udf_ext0_offset(dir) + dir->i_size;
f_pos = udf_ext0_offset(dir);
fibh->sbh = fibh->ebh = NULL;
- fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
+ fibh->soffset = fibh->eoffset = f_pos & (sb->s_blocksize - 1);
if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
- if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
+ if (inode_bmap(dir, f_pos >> sb->s_blocksize_bits, &epos,
&eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30))
goto out_err;
- block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
- if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
+ block = udf_get_lb_pblock(sb, &eloc, offset);
+ if ((++offset << sb->s_blocksize_bits) < elen) {
if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
epos.offset -= sizeof(struct short_ad);
else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
@@ -178,7 +179,7 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
} else
offset = 0;
- fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
+ fibh->sbh = fibh->ebh = udf_tread(sb, block);
if (!fibh->sbh)
goto out_err;
}
@@ -217,12 +218,12 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
}
if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
- if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE))
+ if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
continue;
}
if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
- if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE))
+ if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
continue;
}
@@ -233,8 +234,7 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
if (!lfi)
continue;
- flen = udf_get_filename(dir->i_sb, nameptr, lfi, fname,
- UDF_NAME_LEN);
+ flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN);
if (flen && udf_match(flen, fname, child->len, child->name))
goto out_ok;
}

Privacy Policy