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authorDavid Woodhouse <dwmw2@infradead.org>2006-05-24 02:04:45 +0100
committerDavid Woodhouse <dwmw2@infradead.org>2006-05-24 02:04:45 +0100
commit2f785402f39b96a077b6e62bf26164bfb8e0c980 (patch)
tree3f3a38b484ef2dabda1599d4d8f08b121bd03a76 /fs/jffs2/malloc.c
parent4cbb9b80e171107c6c34116283fe38e5a396c68b (diff)
downloadop-kernel-dev-2f785402f39b96a077b6e62bf26164bfb8e0c980.zip
op-kernel-dev-2f785402f39b96a077b6e62bf26164bfb8e0c980.tar.gz
[JFFS2] Reduce visibility of raw_node_ref to upper layers of JFFS2 code.
As the first step towards eliminating the ref->next_phys member and saving memory by using an _array_ of struct jffs2_raw_node_ref per eraseblock, stop the write functions from allocating their own refs; have them just _reserve_ the appropriate number instead. Then jffs2_link_node_ref() can just fill them in. Use a linked list of pre-allocated refs in the superblock, for now. Once we switch to an array, it'll just be a case of extending that array. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'fs/jffs2/malloc.c')
-rw-r--r--fs/jffs2/malloc.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/fs/jffs2/malloc.c b/fs/jffs2/malloc.c
index f2473fa..3df3250 100644
--- a/fs/jffs2/malloc.c
+++ b/fs/jffs2/malloc.c
@@ -190,7 +190,29 @@ void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x)
kmem_cache_free(tmp_dnode_info_slab, x);
}
-struct jffs2_raw_node_ref *jffs2_alloc_raw_node_ref(void)
+int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c, int nr)
+{
+ struct jffs2_raw_node_ref *p = c->refs;
+
+ dbg_memalloc("%d\n", nr);
+
+ while (nr && p) {
+ p = p->next_in_ino;
+ nr--;
+ }
+ while (nr) {
+ p = __jffs2_alloc_raw_node_ref();
+ if (!p)
+ return -ENOMEM;
+ p->next_in_ino = c->refs;
+ c->refs = p;
+ nr--;
+ }
+ c->reserved_refs = nr;
+ return 0;
+}
+
+struct jffs2_raw_node_ref *__jffs2_alloc_raw_node_ref(void)
{
struct jffs2_raw_node_ref *ret;
ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL);
@@ -198,7 +220,7 @@ struct jffs2_raw_node_ref *jffs2_alloc_raw_node_ref(void)
return ret;
}
-void jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x)
+void __jffs2_free_raw_node_ref(struct jffs2_raw_node_ref *x)
{
dbg_memalloc("%p\n", x);
kmem_cache_free(raw_node_ref_slab, x);
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