16 files changed, 57 insertions, 41 deletions

diff --git a/fs/compat.c b/fs/compat.c
index ff66c0d7583d..c580c322fa6b 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -49,6 +49,7 @@
 #include <linux/eventpoll.h>
 #include <linux/fs_struct.h>
 #include <linux/slab.h>
+#include <linux/pagemap.h>
 
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
diff --git a/fs/jffs2/build.c b/fs/jffs2/build.c
index a906f538d11c..85c6be2db02f 100644
--- a/fs/jffs2/build.c
+++ b/fs/jffs2/build.c
@@ -23,7 +23,7 @@ static void jffs2_build_remove_unlinked_inode(struct jffs2_sb_info *,
 static inline struct jffs2_inode_cache *
 first_inode_chain(int *i, struct jffs2_sb_info *c)
 {
-        for (; *i < INOCACHE_HASHSIZE; (*i)++) {
+        for (; *i < c->inocache_hashsize; (*i)++) {
                 if (c->inocache_list[*i])
                         return c->inocache_list[*i];
         }
diff --git a/fs/jffs2/compr.c b/fs/jffs2/compr.c
index 617a1e5694c1..de4247021d25 100644
--- a/fs/jffs2/compr.c
+++ b/fs/jffs2/compr.c
@@ -103,7 +103,7 @@ uint16_t jffs2_compress(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
                         spin_unlock(&jffs2_compressor_list_lock);
                         *datalen  = orig_slen;
                         *cdatalen = orig_dlen;
-                        compr_ret = this->compress(data_in, output_buf, datalen, cdatalen, NULL);
+                        compr_ret = this->compress(data_in, output_buf, datalen, cdatalen);
                         spin_lock(&jffs2_compressor_list_lock);
                         this->usecount--;
                         if (!compr_ret) {
@@ -152,7 +152,7 @@ uint16_t jffs2_compress(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
                         spin_unlock(&jffs2_compressor_list_lock);
                         *datalen  = orig_slen;
                         *cdatalen = orig_dlen;
-                        compr_ret = this->compress(data_in, this->compr_buf, datalen, cdatalen, NULL);
+                        compr_ret = this->compress(data_in, this->compr_buf, datalen, cdatalen);
                         spin_lock(&jffs2_compressor_list_lock);
                         this->usecount--;
                         if (!compr_ret) {
@@ -220,7 +220,7 @@ int jffs2_decompress(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
                         if (comprtype == this->compr) {
                                 this->usecount++;
                                 spin_unlock(&jffs2_compressor_list_lock);
-                                ret = this->decompress(cdata_in, data_out, cdatalen, datalen, NULL);
+                                ret = this->decompress(cdata_in, data_out, cdatalen, datalen);
                                 spin_lock(&jffs2_compressor_list_lock);
                                 if (ret) {
                                         printk(KERN_WARNING "Decompressor \"%s\" returned %d\n", this->name, ret);
diff --git a/fs/jffs2/compr.h b/fs/jffs2/compr.h
index e471a9106fd9..13bb7597ab39 100644
--- a/fs/jffs2/compr.h
+++ b/fs/jffs2/compr.h
@@ -49,9 +49,9 @@ struct jffs2_compressor {
         char *name;
         char compr;                     /* JFFS2_COMPR_XXX */
         int (*compress)(unsigned char *data_in, unsigned char *cpage_out,
-                        uint32_t *srclen, uint32_t *destlen, void *model);
+                        uint32_t *srclen, uint32_t *destlen);
         int (*decompress)(unsigned char *cdata_in, unsigned char *data_out,
-                          uint32_t cdatalen, uint32_t datalen, void *model);
+                          uint32_t cdatalen, uint32_t datalen);
         int usecount;
         int disabled;           /* if set the compressor won't compress */
         unsigned char *compr_buf;       /* used by size compr. mode */
diff --git a/fs/jffs2/compr_lzo.c b/fs/jffs2/compr_lzo.c
index ed25ae7c98eb..af186ee674d8 100644
--- a/fs/jffs2/compr_lzo.c
+++ b/fs/jffs2/compr_lzo.c
@@ -42,7 +42,7 @@ static int __init alloc_workspace(void)
 }
 
 static int jffs2_lzo_compress(unsigned char *data_in, unsigned char *cpage_out,
-                              uint32_t *sourcelen, uint32_t *dstlen, void *model)
+                              uint32_t *sourcelen, uint32_t *dstlen)
 {
         size_t compress_size;
         int ret;
@@ -67,7 +67,7 @@ static int jffs2_lzo_compress(unsigned char *data_in, unsigned char *cpage_out,
 }
 
 static int jffs2_lzo_decompress(unsigned char *data_in, unsigned char *cpage_out,
-                                 uint32_t srclen, uint32_t destlen, void *model)
+                                 uint32_t srclen, uint32_t destlen)
 {
         size_t dl = destlen;
         int ret;
diff --git a/fs/jffs2/compr_rtime.c b/fs/jffs2/compr_rtime.c
index 9696ad9ef5f7..16a5047903a6 100644
--- a/fs/jffs2/compr_rtime.c
+++ b/fs/jffs2/compr_rtime.c
@@ -31,8 +31,7 @@
 /* _compress returns the compressed size, -1 if bigger */
 static int jffs2_rtime_compress(unsigned char *data_in,
                                 unsigned char *cpage_out,
-                                uint32_t *sourcelen, uint32_t *dstlen,
-                                void *model)
+                                uint32_t *sourcelen, uint32_t *dstlen)
 {
         short positions[256];
         int outpos = 0;
@@ -73,8 +72,7 @@ static int jffs2_rtime_compress(unsigned char *data_in,
 
 static int jffs2_rtime_decompress(unsigned char *data_in,
                                   unsigned char *cpage_out,
-                                  uint32_t srclen, uint32_t destlen,
-                                  void *model)
+                                  uint32_t srclen, uint32_t destlen)
 {
         short positions[256];
         int outpos = 0;
diff --git a/fs/jffs2/compr_rubin.c b/fs/jffs2/compr_rubin.c
index a12b4f763373..9e7cec808c4c 100644
--- a/fs/jffs2/compr_rubin.c
+++ b/fs/jffs2/compr_rubin.c
@@ -298,7 +298,7 @@ static int rubin_do_compress(int bit_divider, int *bits, unsigned char *data_in,
 #if 0
 /* _compress returns the compressed size, -1 if bigger */
 int jffs2_rubinmips_compress(unsigned char *data_in, unsigned char *cpage_out,
-                   uint32_t *sourcelen, uint32_t *dstlen, void *model)
+                   uint32_t *sourcelen, uint32_t *dstlen)
 {
         return rubin_do_compress(BIT_DIVIDER_MIPS, bits_mips, data_in,
                                  cpage_out, sourcelen, dstlen);
@@ -306,8 +306,7 @@ int jffs2_rubinmips_compress(unsigned char *data_in, unsigned char *cpage_out,
 #endif
 static int jffs2_dynrubin_compress(unsigned char *data_in,
                                    unsigned char *cpage_out,
-                                   uint32_t *sourcelen, uint32_t *dstlen,
-                                   void *model)
+                                   uint32_t *sourcelen, uint32_t *dstlen)
 {
         int bits[8];
         unsigned char histo[256];
@@ -387,8 +386,7 @@ static void rubin_do_decompress(int bit_divider, int *bits,
 
 static int jffs2_rubinmips_decompress(unsigned char *data_in,
                                       unsigned char *cpage_out,
-                                      uint32_t sourcelen, uint32_t dstlen,
-                                      void *model)
+                                      uint32_t sourcelen, uint32_t dstlen)
 {
         rubin_do_decompress(BIT_DIVIDER_MIPS, bits_mips, data_in,
                             cpage_out, sourcelen, dstlen);
@@ -397,8 +395,7 @@ static int jffs2_rubinmips_decompress(unsigned char *data_in,
 
 static int jffs2_dynrubin_decompress(unsigned char *data_in,
                                      unsigned char *cpage_out,
-                                     uint32_t sourcelen, uint32_t dstlen,
-                                     void *model)
+                                     uint32_t sourcelen, uint32_t dstlen)
 {
         int bits[8];
         int c;
diff --git a/fs/jffs2/compr_zlib.c b/fs/jffs2/compr_zlib.c
index 97fc45de6f81..fd05a0b9431d 100644
--- a/fs/jffs2/compr_zlib.c
+++ b/fs/jffs2/compr_zlib.c
@@ -68,8 +68,7 @@ static void free_workspaces(void)
 
 static int jffs2_zlib_compress(unsigned char *data_in,
                                unsigned char *cpage_out,
-                               uint32_t *sourcelen, uint32_t *dstlen,
-                               void *model)
+                               uint32_t *sourcelen, uint32_t *dstlen)
 {
         int ret;
 
@@ -136,8 +135,7 @@ static int jffs2_zlib_compress(unsigned char *data_in,
 
 static int jffs2_zlib_decompress(unsigned char *data_in,
                                  unsigned char *cpage_out,
-                                 uint32_t srclen, uint32_t destlen,
-                                 void *model)
+                                 uint32_t srclen, uint32_t destlen)
 {
         int ret;
         int wbits = MAX_WBITS;
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index 79121aa5858b..92978658ed18 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -367,7 +367,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
         }
 
         /* We use f->target field to store the target path. */
-        f->target = kmalloc(targetlen + 1, GFP_KERNEL);
+        f->target = kmemdup(target, targetlen + 1, GFP_KERNEL);
         if (!f->target) {
                 printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1);
                 mutex_unlock(&f->sem);
@@ -376,7 +376,6 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
                 goto fail;
         }
 
-        memcpy(f->target, target, targetlen + 1);
         D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target));
 
         /* No data here. Only a metadata node, which will be
diff --git a/fs/jffs2/erase.c b/fs/jffs2/erase.c
index abac961f617b..e513f1913c15 100644
--- a/fs/jffs2/erase.c
+++ b/fs/jffs2/erase.c
@@ -151,7 +151,7 @@ int jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count)
                 }
 
                 /* Be nice */
-                yield();
+                cond_resched();
                 mutex_lock(&c->erase_free_sem);
                 spin_lock(&c->erase_completion_lock);
         }
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index d9beb06e6fca..e896e67767eb 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -474,6 +474,25 @@ struct inode *jffs2_new_inode (struct inode *dir_i, int mode, struct jffs2_raw_i
         return inode;
 }
 
+static int calculate_inocache_hashsize(uint32_t flash_size)
+{
+        /*
+         * Pick a inocache hash size based on the size of the medium.
+         * Count how many megabytes we're dealing with, apply a hashsize twice
+         * that size, but rounding down to the usual big powers of 2. And keep
+         * to sensible bounds.
+         */
+
+        int size_mb = flash_size / 1024 / 1024;
+        int hashsize = (size_mb * 2) & ~0x3f;
+
+        if (hashsize < INOCACHE_HASHSIZE_MIN)
+                return INOCACHE_HASHSIZE_MIN;
+        if (hashsize > INOCACHE_HASHSIZE_MAX)
+                return INOCACHE_HASHSIZE_MAX;
+
+        return hashsize;
+}
 
 int jffs2_do_fill_super(struct super_block *sb, void *data, int silent)
 {
@@ -520,7 +539,8 @@ int jffs2_do_fill_super(struct super_block *sb, void *data, int silent)
         if (ret)
                 return ret;
 
-        c->inocache_list = kcalloc(INOCACHE_HASHSIZE, sizeof(struct jffs2_inode_cache *), GFP_KERNEL);
+        c->inocache_hashsize = calculate_inocache_hashsize(c->flash_size);
+        c->inocache_list = kcalloc(c->inocache_hashsize, sizeof(struct jffs2_inode_cache *), GFP_KERNEL);
         if (!c->inocache_list) {
                 ret = -ENOMEM;
                 goto out_wbuf;
diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c
index 846a79452497..31dce611337c 100644
--- a/fs/jffs2/gc.c
+++ b/fs/jffs2/gc.c
@@ -219,13 +219,14 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c)
         if (!list_empty(&c->erase_complete_list) ||
             !list_empty(&c->erase_pending_list)) {
                 spin_unlock(&c->erase_completion_lock);
+                mutex_unlock(&c->alloc_sem);
                 D1(printk(KERN_DEBUG "jffs2_garbage_collect_pass() erasing pending blocks\n"));
-                if (jffs2_erase_pending_blocks(c, 1)) {
-                        mutex_unlock(&c->alloc_sem);
+                if (jffs2_erase_pending_blocks(c, 1))
                         return 0;
-                }
+
                 D1(printk(KERN_DEBUG "No progress from erasing blocks; doing GC anyway\n"));
                 spin_lock(&c->erase_completion_lock);
+                mutex_lock(&c->alloc_sem);
         }
 
         /* First, work out which block we're garbage-collecting */
diff --git a/fs/jffs2/jffs2_fs_sb.h b/fs/jffs2/jffs2_fs_sb.h
index 6784bc89add1..f864005de64c 100644
--- a/fs/jffs2/jffs2_fs_sb.h
+++ b/fs/jffs2/jffs2_fs_sb.h
@@ -100,6 +100,7 @@ struct jffs2_sb_info {
         wait_queue_head_t erase_wait;           /* For waiting for erases to complete */
 
         wait_queue_head_t inocache_wq;
+        int inocache_hashsize;
         struct jffs2_inode_cache **inocache_list;
         spinlock_t inocache_lock;
 
diff --git a/fs/jffs2/nodelist.c b/fs/jffs2/nodelist.c
index af02bd138469..5e03233c2363 100644
--- a/fs/jffs2/nodelist.c
+++ b/fs/jffs2/nodelist.c
@@ -420,7 +420,7 @@ struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t
 {
         struct jffs2_inode_cache *ret;
 
-        ret = c->inocache_list[ino % INOCACHE_HASHSIZE];
+        ret = c->inocache_list[ino % c->inocache_hashsize];
         while (ret && ret->ino < ino) {
                 ret = ret->next;
         }
@@ -441,7 +441,7 @@ void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new
 
         dbg_inocache("add %p (ino #%u)\n", new, new->ino);
 
-        prev = &c->inocache_list[new->ino % INOCACHE_HASHSIZE];
+        prev = &c->inocache_list[new->ino % c->inocache_hashsize];
 
         while ((*prev) && (*prev)->ino < new->ino) {
                 prev = &(*prev)->next;
@@ -462,7 +462,7 @@ void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old)
         dbg_inocache("del %p (ino #%u)\n", old, old->ino);
         spin_lock(&c->inocache_lock);
 
-        prev = &c->inocache_list[old->ino % INOCACHE_HASHSIZE];
+        prev = &c->inocache_list[old->ino % c->inocache_hashsize];
 
         while ((*prev) && (*prev)->ino < old->ino) {
                 prev = &(*prev)->next;
@@ -487,7 +487,7 @@ void jffs2_free_ino_caches(struct jffs2_sb_info *c)
         int i;
         struct jffs2_inode_cache *this, *next;
 
-        for (i=0; i<INOCACHE_HASHSIZE; i++) {
+        for (i=0; i < c->inocache_hashsize; i++) {
                 this = c->inocache_list[i];
                 while (this) {
                         next = this->next;
diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h
index 523a91691052..5a53d9bdb2b5 100644
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -199,7 +199,8 @@ struct jffs2_inode_cache {
 #define RAWNODE_CLASS_XATTR_DATUM       1
 #define RAWNODE_CLASS_XATTR_REF         2
 
-#define INOCACHE_HASHSIZE 128
+#define INOCACHE_HASHSIZE_MIN 128
+#define INOCACHE_HASHSIZE_MAX 1024
 
 #define write_ofs(c) ((c)->nextblock->offset + (c)->sector_size - (c)->nextblock->free_size)
 
diff --git a/fs/jffs2/scan.c b/fs/jffs2/scan.c
index 46f870d1cc36..b632dddcb482 100644
--- a/fs/jffs2/scan.c
+++ b/fs/jffs2/scan.c
@@ -20,7 +20,7 @@
 #include "summary.h"
 #include "debug.h"
 
-#define DEFAULT_EMPTY_SCAN_SIZE 1024
+#define DEFAULT_EMPTY_SCAN_SIZE 256
 
 #define noisy_printk(noise, args...) do { \
         if (*(noise)) { \
@@ -435,7 +435,7 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo
                                   unsigned char *buf, uint32_t buf_size, struct jffs2_summary *s) {
         struct jffs2_unknown_node *node;
         struct jffs2_unknown_node crcnode;
-        uint32_t ofs, prevofs;
+        uint32_t ofs, prevofs, max_ofs;
         uint32_t hdr_crc, buf_ofs, buf_len;
         int err;
         int noise = 0;
@@ -550,12 +550,12 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo
 
         /* We temporarily use 'ofs' as a pointer into the buffer/jeb */
         ofs = 0;
-
-        /* Scan only 4KiB of 0xFF before declaring it's empty */
-        while(ofs < EMPTY_SCAN_SIZE(c->sector_size) && *(uint32_t *)(&buf[ofs]) == 0xFFFFFFFF)
+        max_ofs = EMPTY_SCAN_SIZE(c->sector_size);
+        /* Scan only EMPTY_SCAN_SIZE of 0xFF before declaring it's empty */
+        while(ofs < max_ofs && *(uint32_t *)(&buf[ofs]) == 0xFFFFFFFF)
                 ofs += 4;
 
-        if (ofs == EMPTY_SCAN_SIZE(c->sector_size)) {
+        if (ofs == max_ofs) {
 #ifdef CONFIG_JFFS2_FS_WRITEBUFFER
                 if (jffs2_cleanmarker_oob(c)) {
                         /* scan oob, take care of cleanmarker */