AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

[JFFS2] Reduce calls to ref_totlen() in jffs2_mark_node_obsolete()

Browse Source 
We were calling ref_totlen() 18 times. Even before that becomes a real
function rather than just a dereference, apparently some compilers still
suck anyway. It'll _certainly_ suck after ref_totlen() becomes more
complicated, so calculate it once and don't rely on CSE.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
David Woodhouse 2006-05-20 16:20:19 +01:00
parent 9641b784ff
commit 1417fc44ee
1 changed files with 21 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
fs/jffs2/nodemgmt.c
View File

@ -470,6 +470,7 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
struct jffs2_unknown_node n;
int ret, addedsize;
size_t retlen;
uint32_t freed_len;
if(!ref) {
printk(KERN_NOTICE "EEEEEK. jffs2_mark_node_obsolete called with NULL node\n");
@ -499,32 +500,34 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
spin_lock(&c->erase_completion_lock);
freed_len = ref_totlen(c, jeb, ref);
if (ref_flags(ref) == REF_UNCHECKED) {
D1(if (unlikely(jeb->unchecked_size < ref_totlen(c, jeb, ref))) {
D1(if (unlikely(jeb->unchecked_size < freed_len)) {
printk(KERN_NOTICE "raw unchecked node of size 0x%08x freed from erase block %d at 0x%08x, but unchecked_size was already 0x%08x\n",
ref_totlen(c, jeb, ref), blocknr, ref->flash_offset, jeb->used_size);
freed_len, blocknr, ref->flash_offset, jeb->used_size);
BUG();
})
D1(printk(KERN_DEBUG "Obsoleting previously unchecked node at 0x%08x of len %x: ", ref_offset(ref), ref_totlen(c, jeb, ref)));
jeb->unchecked_size -= ref_totlen(c, jeb, ref);
c->unchecked_size -= ref_totlen(c, jeb, ref);
D1(printk(KERN_DEBUG "Obsoleting previously unchecked node at 0x%08x of len %x: ", ref_offset(ref), freed_len));
jeb->unchecked_size -= freed_len;
c->unchecked_size -= freed_len;
} else {
D1(if (unlikely(jeb->used_size < ref_totlen(c, jeb, ref))) {
D1(if (unlikely(jeb->used_size < freed_len)) {
printk(KERN_NOTICE "raw node of size 0x%08x freed from erase block %d at 0x%08x, but used_size was already 0x%08x\n",
ref_totlen(c, jeb, ref), blocknr, ref->flash_offset, jeb->used_size);
freed_len, blocknr, ref->flash_offset, jeb->used_size);
BUG();
})
D1(printk(KERN_DEBUG "Obsoleting node at 0x%08x of len %#x: ", ref_offset(ref), ref_totlen(c, jeb, ref)));
jeb->used_size -= ref_totlen(c, jeb, ref);
c->used_size -= ref_totlen(c, jeb, ref);
D1(printk(KERN_DEBUG "Obsoleting node at 0x%08x of len %#x: ", ref_offset(ref), freed_len));
jeb->used_size -= freed_len;
c->used_size -= freed_len;
}
// Take care, that wasted size is taken into concern
if ((jeb->dirty_size || ISDIRTY(jeb->wasted_size + ref_totlen(c, jeb, ref))) && jeb != c->nextblock) {
if ((jeb->dirty_size || ISDIRTY(jeb->wasted_size + freed_len)) && jeb != c->nextblock) {
D1(printk(KERN_DEBUG "Dirtying\n"));
addedsize = ref_totlen(c, jeb, ref);
jeb->dirty_size += ref_totlen(c, jeb, ref);
c->dirty_size += ref_totlen(c, jeb, ref);
addedsize = freed_len;
jeb->dirty_size += freed_len;
c->dirty_size += freed_len;
/* Convert wasted space to dirty, if not a bad block */
if (jeb->wasted_size) {
@ -545,8 +548,8 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
} else {
D1(printk(KERN_DEBUG "Wasting\n"));
addedsize = 0;
jeb->wasted_size += ref_totlen(c, jeb, ref);
c->wasted_size += ref_totlen(c, jeb, ref);
jeb->wasted_size += freed_len;
c->wasted_size += freed_len;
}
ref->flash_offset = ref_offset(ref) | REF_OBSOLETE;
@ -634,8 +637,8 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
printk(KERN_WARNING "Short read from obsoleted node at 0x%08x: %zd\n", ref_offset(ref), retlen);
goto out_erase_sem;
}
if (PAD(je32_to_cpu(n.totlen)) != PAD(ref_totlen(c, jeb, ref))) {
printk(KERN_WARNING "Node totlen on flash (0x%08x) != totlen from node ref (0x%08x)\n", je32_to_cpu(n.totlen), ref_totlen(c, jeb, ref));
if (PAD(je32_to_cpu(n.totlen)) != PAD(freed_len)) {
printk(KERN_WARNING "Node totlen on flash (0x%08x) != totlen from node ref (0x%08x)\n", je32_to_cpu(n.totlen), freed_len);
goto out_erase_sem;
}
if (!(je16_to_cpu(n.nodetype) & JFFS2_NODE_ACCURATE)) {