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Diffstat (limited to 'fs/jffs2/wbuf.c')
-rw-r--r--fs/jffs2/wbuf.c215
1 files changed, 127 insertions, 88 deletions
diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c
index 316133c..4cebf0e 100644
--- a/fs/jffs2/wbuf.c
+++ b/fs/jffs2/wbuf.c
@@ -9,7 +9,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: wbuf.c,v 1.92 2005/04/05 12:51:54 dedekind Exp $
+ * $Id: wbuf.c,v 1.100 2005/09/30 13:59:13 dedekind Exp $
*
*/
@@ -30,12 +30,12 @@
static unsigned char *brokenbuf;
#endif
+#define PAGE_DIV(x) ( ((unsigned long)(x) / (unsigned long)(c->wbuf_pagesize)) * (unsigned long)(c->wbuf_pagesize) )
+#define PAGE_MOD(x) ( (unsigned long)(x) % (unsigned long)(c->wbuf_pagesize) )
+
/* max. erase failures before we mark a block bad */
#define MAX_ERASE_FAILURES 2
-/* two seconds timeout for timed wbuf-flushing */
-#define WBUF_FLUSH_TIMEOUT 2 * HZ
-
struct jffs2_inodirty {
uint32_t ino;
struct jffs2_inodirty *next;
@@ -139,7 +139,6 @@ static void jffs2_block_refile(struct jffs2_sb_info *c, struct jffs2_eraseblock
{
D1(printk("About to refile bad block at %08x\n", jeb->offset));
- D2(jffs2_dump_block_lists(c));
/* File the existing block on the bad_used_list.... */
if (c->nextblock == jeb)
c->nextblock = NULL;
@@ -156,7 +155,6 @@ static void jffs2_block_refile(struct jffs2_sb_info *c, struct jffs2_eraseblock
c->nr_erasing_blocks++;
jffs2_erase_pending_trigger(c);
}
- D2(jffs2_dump_block_lists(c));
/* Adjust its size counts accordingly */
c->wasted_size += jeb->free_size;
@@ -164,8 +162,9 @@ static void jffs2_block_refile(struct jffs2_sb_info *c, struct jffs2_eraseblock
jeb->wasted_size += jeb->free_size;
jeb->free_size = 0;
- ACCT_SANITY_CHECK(c,jeb);
- D1(ACCT_PARANOIA_CHECK(jeb));
+ jffs2_dbg_dump_block_lists_nolock(c);
+ jffs2_dbg_acct_sanity_check_nolock(c,jeb);
+ jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
}
/* Recover from failure to write wbuf. Recover the nodes up to the
@@ -189,7 +188,7 @@ static void jffs2_wbuf_recover(struct jffs2_sb_info *c)
/* Find the first node to be recovered, by skipping over every
node which ends before the wbuf starts, or which is obsolete. */
first_raw = &jeb->first_node;
- while (*first_raw &&
+ while (*first_raw &&
(ref_obsolete(*first_raw) ||
(ref_offset(*first_raw)+ref_totlen(c, jeb, *first_raw)) < c->wbuf_ofs)) {
D1(printk(KERN_DEBUG "Skipping node at 0x%08x(%d)-0x%08x which is either before 0x%08x or obsolete\n",
@@ -238,7 +237,7 @@ static void jffs2_wbuf_recover(struct jffs2_sb_info *c)
ret = c->mtd->read_ecc(c->mtd, start, c->wbuf_ofs - start, &retlen, buf, NULL, c->oobinfo);
else
ret = c->mtd->read(c->mtd, start, c->wbuf_ofs - start, &retlen, buf);
-
+
if (ret == -EBADMSG && retlen == c->wbuf_ofs - start) {
/* ECC recovered */
ret = 0;
@@ -266,7 +265,7 @@ static void jffs2_wbuf_recover(struct jffs2_sb_info *c)
/* ... and get an allocation of space from a shiny new block instead */
- ret = jffs2_reserve_space_gc(c, end-start, &ofs, &len);
+ ret = jffs2_reserve_space_gc(c, end-start, &ofs, &len, JFFS2_SUMMARY_NOSUM_SIZE);
if (ret) {
printk(KERN_WARNING "Failed to allocate space for wbuf recovery. Data loss ensues.\n");
kfree(buf);
@@ -275,15 +274,15 @@ static void jffs2_wbuf_recover(struct jffs2_sb_info *c)
if (end-start >= c->wbuf_pagesize) {
/* Need to do another write immediately, but it's possible
that this is just because the wbuf itself is completely
- full, and there's nothing earlier read back from the
- flash. Hence 'buf' isn't necessarily what we're writing
+ full, and there's nothing earlier read back from the
+ flash. Hence 'buf' isn't necessarily what we're writing
from. */
unsigned char *rewrite_buf = buf?:c->wbuf;
uint32_t towrite = (end-start) - ((end-start)%c->wbuf_pagesize);
D1(printk(KERN_DEBUG "Write 0x%x bytes at 0x%08x in wbuf recover\n",
towrite, ofs));
-
+
#ifdef BREAKMEHEADER
static int breakme;
if (breakme++ == 20) {
@@ -327,8 +326,7 @@ static void jffs2_wbuf_recover(struct jffs2_sb_info *c)
c->wbuf_ofs = ofs + towrite;
memmove(c->wbuf, rewrite_buf + towrite, c->wbuf_len);
/* Don't muck about with c->wbuf_inodes. False positives are harmless. */
- if (buf)
- kfree(buf);
+ kfree(buf);
} else {
/* OK, now we're left with the dregs in whichever buffer we're using */
if (buf) {
@@ -392,11 +390,11 @@ static void jffs2_wbuf_recover(struct jffs2_sb_info *c)
else
jeb->last_node = container_of(first_raw, struct jffs2_raw_node_ref, next_phys);
- ACCT_SANITY_CHECK(c,jeb);
- D1(ACCT_PARANOIA_CHECK(jeb));
+ jffs2_dbg_acct_sanity_check_nolock(c, jeb);
+ jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
- ACCT_SANITY_CHECK(c,new_jeb);
- D1(ACCT_PARANOIA_CHECK(new_jeb));
+ jffs2_dbg_acct_sanity_check_nolock(c, new_jeb);
+ jffs2_dbg_acct_paranoia_check_nolock(c, new_jeb);
spin_unlock(&c->erase_completion_lock);
@@ -435,15 +433,15 @@ static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad)
this happens, if we have a change to a new block,
or if fsync forces us to flush the writebuffer.
if we have a switch to next page, we will not have
- enough remaining space for this.
+ enough remaining space for this.
*/
- if (pad && !jffs2_dataflash(c)) {
+ if (pad ) {
c->wbuf_len = PAD(c->wbuf_len);
/* Pad with JFFS2_DIRTY_BITMASK initially. this helps out ECC'd NOR
with 8 byte page size */
memset(c->wbuf + c->wbuf_len, 0, c->wbuf_pagesize - c->wbuf_len);
-
+
if ( c->wbuf_len + sizeof(struct jffs2_unknown_node) < c->wbuf_pagesize) {
struct jffs2_unknown_node *padnode = (void *)(c->wbuf + c->wbuf_len);
padnode->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
@@ -454,7 +452,7 @@ static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad)
}
/* else jffs2_flash_writev has actually filled in the rest of the
buffer for us, and will deal with the node refs etc. later. */
-
+
#ifdef BREAKME
static int breakme;
if (breakme++ == 20) {
@@ -463,9 +461,9 @@ static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad)
c->mtd->write_ecc(c->mtd, c->wbuf_ofs, c->wbuf_pagesize,
&retlen, brokenbuf, NULL, c->oobinfo);
ret = -EIO;
- } else
+ } else
#endif
-
+
if (jffs2_cleanmarker_oob(c))
ret = c->mtd->write_ecc(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, c->wbuf, NULL, c->oobinfo);
else
@@ -488,7 +486,7 @@ static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad)
spin_lock(&c->erase_completion_lock);
/* Adjust free size of the block if we padded. */
- if (pad && !jffs2_dataflash(c)) {
+ if (pad) {
struct jffs2_eraseblock *jeb;
jeb = &c->blocks[c->wbuf_ofs / c->sector_size];
@@ -496,7 +494,7 @@ static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad)
D1(printk(KERN_DEBUG "jffs2_flush_wbuf() adjusting free_size of %sblock at %08x\n",
(jeb==c->nextblock)?"next":"", jeb->offset));
- /* wbuf_pagesize - wbuf_len is the amount of space that's to be
+ /* wbuf_pagesize - wbuf_len is the amount of space that's to be
padded. If there is less free space in the block than that,
something screwed up */
if (jeb->free_size < (c->wbuf_pagesize - c->wbuf_len)) {
@@ -524,9 +522,9 @@ static int __jffs2_flush_wbuf(struct jffs2_sb_info *c, int pad)
return 0;
}
-/* Trigger garbage collection to flush the write-buffer.
+/* Trigger garbage collection to flush the write-buffer.
If ino arg is zero, do it if _any_ real (i.e. not GC) writes are
- outstanding. If ino arg non-zero, do it only if a write for the
+ outstanding. If ino arg non-zero, do it only if a write for the
given inode is outstanding. */
int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino)
{
@@ -605,15 +603,6 @@ int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c)
return ret;
}
-
-#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
-#define PAGE_DIV(x) ( ((unsigned long)(x) / (unsigned long)(c->wbuf_pagesize)) * (unsigned long)(c->wbuf_pagesize) )
-#define PAGE_MOD(x) ( (unsigned long)(x) % (unsigned long)(c->wbuf_pagesize) )
-#else
-#define PAGE_DIV(x) ( (x) & (~(c->wbuf_pagesize - 1)) )
-#define PAGE_MOD(x) ( (x) & (c->wbuf_pagesize - 1) )
-#endif
-
int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino)
{
struct kvec outvecs[3];
@@ -630,13 +619,13 @@ int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsig
/* If not NAND flash, don't bother */
if (!jffs2_is_writebuffered(c))
return jffs2_flash_direct_writev(c, invecs, count, to, retlen);
-
+
down_write(&c->wbuf_sem);
/* If wbuf_ofs is not initialized, set it to target address */
if (c->wbuf_ofs == 0xFFFFFFFF) {
c->wbuf_ofs = PAGE_DIV(to);
- c->wbuf_len = PAGE_MOD(to);
+ c->wbuf_len = PAGE_MOD(to);
memset(c->wbuf,0xff,c->wbuf_pagesize);
}
@@ -650,10 +639,10 @@ int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsig
memset(c->wbuf,0xff,c->wbuf_pagesize);
}
}
-
- /* Sanity checks on target address.
- It's permitted to write at PAD(c->wbuf_len+c->wbuf_ofs),
- and it's permitted to write at the beginning of a new
+
+ /* Sanity checks on target address.
+ It's permitted to write at PAD(c->wbuf_len+c->wbuf_ofs),
+ and it's permitted to write at the beginning of a new
erase block. Anything else, and you die.
New block starts at xxx000c (0-b = block header)
*/
@@ -671,8 +660,8 @@ int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsig
}
/* set pointer to new block */
c->wbuf_ofs = PAGE_DIV(to);
- c->wbuf_len = PAGE_MOD(to);
- }
+ c->wbuf_len = PAGE_MOD(to);
+ }
if (to != PAD(c->wbuf_ofs + c->wbuf_len)) {
/* We're not writing immediately after the writebuffer. Bad. */
@@ -692,21 +681,21 @@ int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsig
invec = 0;
outvec = 0;
- /* Fill writebuffer first, if already in use */
+ /* Fill writebuffer first, if already in use */
if (c->wbuf_len) {
uint32_t invec_ofs = 0;
- /* adjust alignment offset */
+ /* adjust alignment offset */
if (c->wbuf_len != PAGE_MOD(to)) {
c->wbuf_len = PAGE_MOD(to);
/* take care of alignment to next page */
if (!c->wbuf_len)
c->wbuf_len = c->wbuf_pagesize;
}
-
+
while(c->wbuf_len < c->wbuf_pagesize) {
uint32_t thislen;
-
+
if (invec == count)
goto alldone;
@@ -714,17 +703,17 @@ int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsig
if (thislen >= invecs[invec].iov_len)
thislen = invecs[invec].iov_len;
-
+
invec_ofs = thislen;
memcpy(c->wbuf + c->wbuf_len, invecs[invec].iov_base, thislen);
c->wbuf_len += thislen;
donelen += thislen;
/* Get next invec, if actual did not fill the buffer */
- if (c->wbuf_len < c->wbuf_pagesize)
+ if (c->wbuf_len < c->wbuf_pagesize)
invec++;
- }
-
+ }
+
/* write buffer is full, flush buffer */
ret = __jffs2_flush_wbuf(c, NOPAD);
if (ret) {
@@ -783,10 +772,10 @@ int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsig
/* We did cross a page boundary, so we write some now */
if (jffs2_cleanmarker_oob(c))
- ret = c->mtd->writev_ecc(c->mtd, outvecs, splitvec+1, outvec_to, &wbuf_retlen, NULL, c->oobinfo);
+ ret = c->mtd->writev_ecc(c->mtd, outvecs, splitvec+1, outvec_to, &wbuf_retlen, NULL, c->oobinfo);
else
ret = jffs2_flash_direct_writev(c, outvecs, splitvec+1, outvec_to, &wbuf_retlen);
-
+
if (ret < 0 || wbuf_retlen != PAGE_DIV(totlen)) {
/* At this point we have no problem,
c->wbuf is empty. However refile nextblock to avoid
@@ -803,7 +792,7 @@ int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsig
spin_unlock(&c->erase_completion_lock);
goto exit;
}
-
+
donelen += wbuf_retlen;
c->wbuf_ofs = PAGE_DIV(outvec_to) + PAGE_DIV(totlen);
@@ -837,11 +826,17 @@ int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsig
alldone:
*retlen = donelen;
+ if (jffs2_sum_active()) {
+ int res = jffs2_sum_add_kvec(c, invecs, count, (uint32_t) to);
+ if (res)
+ return res;
+ }
+
if (c->wbuf_len && ino)
jffs2_wbuf_dirties_inode(c, ino);
ret = 0;
-
+
exit:
up_write(&c->wbuf_sem);
return ret;
@@ -856,7 +851,7 @@ int jffs2_flash_write(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *r
struct kvec vecs[1];
if (!jffs2_is_writebuffered(c))
- return c->mtd->write(c->mtd, ofs, len, retlen, buf);
+ return jffs2_flash_direct_write(c, ofs, len, retlen, buf);
vecs[0].iov_base = (unsigned char *) buf;
vecs[0].iov_len = len;
@@ -884,18 +879,18 @@ int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *re
if ( (ret == -EBADMSG) && (*retlen == len) ) {
printk(KERN_WARNING "mtd->read(0x%zx bytes from 0x%llx) returned ECC error\n",
len, ofs);
- /*
- * We have the raw data without ECC correction in the buffer, maybe
+ /*
+ * We have the raw data without ECC correction in the buffer, maybe
* we are lucky and all data or parts are correct. We check the node.
* If data are corrupted node check will sort it out.
* We keep this block, it will fail on write or erase and the we
* mark it bad. Or should we do that now? But we should give him a chance.
- * Maybe we had a system crash or power loss before the ecc write or
+ * Maybe we had a system crash or power loss before the ecc write or
* a erase was completed.
* So we return success. :)
*/
ret = 0;
- }
+ }
/* if no writebuffer available or write buffer empty, return */
if (!c->wbuf_pagesize || !c->wbuf_len)
@@ -910,16 +905,16 @@ int jffs2_flash_read(struct jffs2_sb_info *c, loff_t ofs, size_t len, size_t *re
if (owbf > c->wbuf_len) /* is read beyond write buffer ? */
goto exit;
lwbf = c->wbuf_len - owbf; /* number of bytes to copy */
- if (lwbf > len)
+ if (lwbf > len)
lwbf = len;
- } else {
+ } else {
orbf = (c->wbuf_ofs - ofs); /* offset in read buffer */
if (orbf > len) /* is write beyond write buffer ? */
goto exit;
lwbf = len - orbf; /* number of bytes to copy */
- if (lwbf > c->wbuf_len)
+ if (lwbf > c->wbuf_len)
lwbf = c->wbuf_len;
- }
+ }
if (lwbf > 0)
memcpy(buf+orbf,c->wbuf+owbf,lwbf);
@@ -947,7 +942,7 @@ int jffs2_check_oob_empty( struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb
printk(KERN_NOTICE "jffs2_check_oob_empty(): allocation of temporary data buffer for oob check failed\n");
return -ENOMEM;
}
- /*
+ /*
* if mode = 0, we scan for a total empty oob area, else we have
* to take care of the cleanmarker in the first page of the block
*/
@@ -956,41 +951,41 @@ int jffs2_check_oob_empty( struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb
D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB failed %d for block at %08x\n", ret, jeb->offset));
goto out;
}
-
+
if (retlen < len) {
D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB return short read "
"(%zd bytes not %d) for block at %08x\n", retlen, len, jeb->offset));
ret = -EIO;
goto out;
}
-
+
/* Special check for first page */
for(i = 0; i < oob_size ; i++) {
/* Yeah, we know about the cleanmarker. */
- if (mode && i >= c->fsdata_pos &&
+ if (mode && i >= c->fsdata_pos &&
i < c->fsdata_pos + c->fsdata_len)
continue;
if (buf[i] != 0xFF) {
D2(printk(KERN_DEBUG "Found %02x at %x in OOB for %08x\n",
- buf[page+i], page+i, jeb->offset));
- ret = 1;
+ buf[i], i, jeb->offset));
+ ret = 1;
goto out;
}
}
- /* we know, we are aligned :) */
+ /* we know, we are aligned :) */
for (page = oob_size; page < len; page += sizeof(long)) {
unsigned long dat = *(unsigned long *)(&buf[page]);
if(dat != -1) {
- ret = 1;
+ ret = 1;
goto out;
}
}
out:
- kfree(buf);
-
+ kfree(buf);
+
return ret;
}
@@ -1072,7 +1067,7 @@ int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_erasebloc
n.totlen = cpu_to_je32(8);
ret = jffs2_flash_write_oob(c, jeb->offset + c->fsdata_pos, c->fsdata_len, &retlen, (unsigned char *)&n);
-
+
if (ret) {
D1(printk(KERN_WARNING "jffs2_write_nand_cleanmarker(): Write failed for block at %08x: error %d\n", jeb->offset, ret));
return ret;
@@ -1084,7 +1079,7 @@ int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_erasebloc
return 0;
}
-/*
+/*
* On NAND we try to mark this block bad. If the block was erased more
* than MAX_ERASE_FAILURES we mark it finaly bad.
* Don't care about failures. This block remains on the erase-pending
@@ -1105,7 +1100,7 @@ int jffs2_write_nand_badblock(struct jffs2_sb_info *c, struct jffs2_eraseblock *
D1(printk(KERN_WARNING "jffs2_write_nand_badblock(): Marking bad block at %08x\n", bad_offset));
ret = c->mtd->block_markbad(c->mtd, bad_offset);
-
+
if (ret) {
D1(printk(KERN_WARNING "jffs2_write_nand_badblock(): Write failed for block at %08x: error %d\n", jeb->offset, ret));
return ret;
@@ -1129,7 +1124,7 @@ static int jffs2_nand_set_oobinfo(struct jffs2_sb_info *c)
/* Do this only, if we have an oob buffer */
if (!c->mtd->oobsize)
return 0;
-
+
/* Cleanmarker is out-of-band, so inline size zero */
c->cleanmarker_size = 0;
@@ -1155,7 +1150,7 @@ static int jffs2_nand_set_oobinfo(struct jffs2_sb_info *c)
c->fsdata_len = NAND_JFFS2_OOB16_FSDALEN;
c->badblock_pos = 15;
break;
-
+
default:
D1(printk(KERN_DEBUG "JFFS2 on NAND. No autoplacment info found\n"));
return -EINVAL;
@@ -1172,7 +1167,7 @@ int jffs2_nand_flash_setup(struct jffs2_sb_info *c)
init_rwsem(&c->wbuf_sem);
c->wbuf_pagesize = c->mtd->oobblock;
c->wbuf_ofs = 0xFFFFFFFF;
-
+
c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
if (!c->wbuf)
return -ENOMEM;
@@ -1198,17 +1193,41 @@ void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c)
int jffs2_dataflash_setup(struct jffs2_sb_info *c) {
c->cleanmarker_size = 0; /* No cleanmarkers needed */
-
+
/* Initialize write buffer */
init_rwsem(&c->wbuf_sem);
- c->wbuf_pagesize = c->sector_size;
- c->wbuf_ofs = 0xFFFFFFFF;
+
+ c->wbuf_pagesize = c->mtd->erasesize;
+
+ /* Find a suitable c->sector_size
+ * - Not too much sectors
+ * - Sectors have to be at least 4 K + some bytes
+ * - All known dataflashes have erase sizes of 528 or 1056
+ * - we take at least 8 eraseblocks and want to have at least 8K size
+ * - The concatenation should be a power of 2
+ */
+
+ c->sector_size = 8 * c->mtd->erasesize;
+
+ while (c->sector_size < 8192) {
+ c->sector_size *= 2;
+ }
+
+ /* It may be necessary to adjust the flash size */
+ c->flash_size = c->mtd->size;
+
+ if ((c->flash_size % c->sector_size) != 0) {
+ c->flash_size = (c->flash_size / c->sector_size) * c->sector_size;
+ printk(KERN_WARNING "JFFS2 flash size adjusted to %dKiB\n", c->flash_size);
+ };
+
+ c->wbuf_ofs = 0xFFFFFFFF;
c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
if (!c->wbuf)
return -ENOMEM;
- printk(KERN_INFO "JFFS2 write-buffering enabled (%i)\n", c->wbuf_pagesize);
+ printk(KERN_INFO "JFFS2 write-buffering enabled buffer (%d) erasesize (%d)\n", c->wbuf_pagesize, c->sector_size);
return 0;
}
@@ -1236,3 +1255,23 @@ int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c) {
void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c) {
kfree(c->wbuf);
}
+
+int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c) {
+ /* Cleanmarker currently occupies a whole programming region */
+ c->cleanmarker_size = MTD_PROGREGION_SIZE(c->mtd);
+
+ /* Initialize write buffer */
+ init_rwsem(&c->wbuf_sem);
+ c->wbuf_pagesize = MTD_PROGREGION_SIZE(c->mtd);
+ c->wbuf_ofs = 0xFFFFFFFF;
+
+ c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
+ if (!c->wbuf)
+ return -ENOMEM;
+
+ return 0;
+}
+
+void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c) {
+ kfree(c->wbuf);
+}
generated by cgit v0.10.2 at 2024-11-14 01:07:23 (GMT)