udf: cache struct udf_inode_info
cache UDF_I(struct inode *) return values when there are
at least 2 uses in one function
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Acked-by: Jan Kara <jack@suse.cz>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/udf/misc.c b/fs/udf/misc.c
index 2af4470..a1d6da0 100644
--- a/fs/udf/misc.c
+++ b/fs/udf/misc.c
@@ -51,17 +51,18 @@
uint8_t *ea = NULL, *ad = NULL;
int offset;
uint16_t crclen;
+ struct udf_inode_info *iinfo = UDF_I(inode);
- ea = UDF_I(inode)->i_ext.i_data;
- if (UDF_I(inode)->i_lenEAttr) {
- ad = UDF_I(inode)->i_ext.i_data + UDF_I(inode)->i_lenEAttr;
+ ea = iinfo->i_ext.i_data;
+ if (iinfo->i_lenEAttr) {
+ ad = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
} else {
ad = ea;
size += sizeof(struct extendedAttrHeaderDesc);
}
offset = inode->i_sb->s_blocksize - udf_file_entry_alloc_offset(inode) -
- UDF_I(inode)->i_lenAlloc;
+ iinfo->i_lenAlloc;
/* TODO - Check for FreeEASpace */
@@ -69,21 +70,21 @@
struct extendedAttrHeaderDesc *eahd;
eahd = (struct extendedAttrHeaderDesc *)ea;
- if (UDF_I(inode)->i_lenAlloc)
- memmove(&ad[size], ad, UDF_I(inode)->i_lenAlloc);
+ if (iinfo->i_lenAlloc)
+ memmove(&ad[size], ad, iinfo->i_lenAlloc);
- if (UDF_I(inode)->i_lenEAttr) {
+ if (iinfo->i_lenEAttr) {
/* check checksum/crc */
if (eahd->descTag.tagIdent !=
cpu_to_le16(TAG_IDENT_EAHD) ||
le32_to_cpu(eahd->descTag.tagLocation) !=
- UDF_I(inode)->i_location.logicalBlockNum)
+ iinfo->i_location.logicalBlockNum)
return NULL;
} else {
struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
size -= sizeof(struct extendedAttrHeaderDesc);
- UDF_I(inode)->i_lenEAttr +=
+ iinfo->i_lenEAttr +=
sizeof(struct extendedAttrHeaderDesc);
eahd->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EAHD);
if (sbi->s_udfrev >= 0x0200)
@@ -93,15 +94,15 @@
eahd->descTag.tagSerialNum =
cpu_to_le16(sbi->s_serial_number);
eahd->descTag.tagLocation = cpu_to_le32(
- UDF_I(inode)->i_location.logicalBlockNum);
+ iinfo->i_location.logicalBlockNum);
eahd->impAttrLocation = cpu_to_le32(0xFFFFFFFF);
eahd->appAttrLocation = cpu_to_le32(0xFFFFFFFF);
}
- offset = UDF_I(inode)->i_lenEAttr;
+ offset = iinfo->i_lenEAttr;
if (type < 2048) {
if (le32_to_cpu(eahd->appAttrLocation) <
- UDF_I(inode)->i_lenEAttr) {
+ iinfo->i_lenEAttr) {
uint32_t aal =
le32_to_cpu(eahd->appAttrLocation);
memmove(&ea[offset - aal + size],
@@ -111,7 +112,7 @@
cpu_to_le32(aal + size);
}
if (le32_to_cpu(eahd->impAttrLocation) <
- UDF_I(inode)->i_lenEAttr) {
+ iinfo->i_lenEAttr) {
uint32_t ial =
le32_to_cpu(eahd->impAttrLocation);
memmove(&ea[offset - ial + size],
@@ -122,7 +123,7 @@
}
} else if (type < 65536) {
if (le32_to_cpu(eahd->appAttrLocation) <
- UDF_I(inode)->i_lenEAttr) {
+ iinfo->i_lenEAttr) {
uint32_t aal =
le32_to_cpu(eahd->appAttrLocation);
memmove(&ea[offset - aal + size],
@@ -138,7 +139,7 @@
eahd->descTag.descCRC = cpu_to_le16(udf_crc((char *)eahd +
sizeof(tag), crclen, 0));
eahd->descTag.tagChecksum = udf_tag_checksum(&eahd->descTag);
- UDF_I(inode)->i_lenEAttr += size;
+ iinfo->i_lenEAttr += size;
return (struct genericFormat *)&ea[offset];
}
if (loc & 0x02)
@@ -153,10 +154,11 @@
struct genericFormat *gaf;
uint8_t *ea = NULL;
uint32_t offset;
+ struct udf_inode_info *iinfo = UDF_I(inode);
- ea = UDF_I(inode)->i_ext.i_data;
+ ea = iinfo->i_ext.i_data;
- if (UDF_I(inode)->i_lenEAttr) {
+ if (iinfo->i_lenEAttr) {
struct extendedAttrHeaderDesc *eahd;
eahd = (struct extendedAttrHeaderDesc *)ea;
@@ -164,7 +166,7 @@
if (eahd->descTag.tagIdent !=
cpu_to_le16(TAG_IDENT_EAHD) ||
le32_to_cpu(eahd->descTag.tagLocation) !=
- UDF_I(inode)->i_location.logicalBlockNum)
+ iinfo->i_location.logicalBlockNum)
return NULL;
if (type < 2048)
@@ -174,7 +176,7 @@
else
offset = le32_to_cpu(eahd->appAttrLocation);
- while (offset < UDF_I(inode)->i_lenEAttr) {
+ while (offset < iinfo->i_lenEAttr) {
gaf = (struct genericFormat *)&ea[offset];
if (le32_to_cpu(gaf->attrType) == type &&
gaf->attrSubtype == subtype)
