Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 17 insertions, 14 deletions

diff --git a/fs/jffs2/scan.c b/fs/jffs2/scan.c
index 46f870d1cc36..8d8cd3419d02 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)) { \
@@ -94,7 +94,7 @@ int jffs2_scan_medium(struct jffs2_sb_info *c)
         uint32_t buf_size = 0;
         struct jffs2_summary *s = NULL; /* summary info collected by the scan process */
 #ifndef __ECOS
-        size_t pointlen;
+        size_t pointlen, try_size;
 
         if (c->mtd->point) {
                 ret = c->mtd->point(c->mtd, 0, c->mtd->size, &pointlen,
@@ -113,18 +113,21 @@ int jffs2_scan_medium(struct jffs2_sb_info *c)
                 /* For NAND it's quicker to read a whole eraseblock at a time,
                    apparently */
                 if (jffs2_cleanmarker_oob(c))
-                        buf_size = c->sector_size;
+                        try_size = c->sector_size;
                 else
-                        buf_size = PAGE_SIZE;
+                        try_size = PAGE_SIZE;
 
-                /* Respect kmalloc limitations */
-                if (buf_size > 128*1024)
-                        buf_size = 128*1024;
+                D1(printk(KERN_DEBUG "Trying to allocate readbuf of %zu "
+                        "bytes\n", try_size));
 
-                D1(printk(KERN_DEBUG "Allocating readbuf of %d bytes\n", buf_size));
-                flashbuf = kmalloc(buf_size, GFP_KERNEL);
+                flashbuf = mtd_kmalloc_up_to(c->mtd, &try_size);
                 if (!flashbuf)
                         return -ENOMEM;
+
+                D1(printk(KERN_DEBUG "Allocated readbuf of %zu bytes\n",
+                        try_size));
+
+                buf_size = (uint32_t)try_size;
         }
 
         if (jffs2_sum_active()) {
@@ -435,7 +438,7 @@ 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 +553,12 @@ 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 */