10 files changed, 70 insertions, 33 deletions

diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index 0417516503f6..526f327475ce 100644
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -1391,11 +1391,11 @@ static inline void tlb_write_random(void)
 static inline unsigned int                                      \
 set_c0_##name(unsigned int set)                                 \
 {                                                               \
-        unsigned int res;                                       \
+        unsigned int res, new;                                  \
                                                                 \
         res = read_c0_##name();                                 \
-        res |= set;                                             \
-        write_c0_##name(res);                                   \
+        new = res | set;                                        \
+        write_c0_##name(new);                                   \
                                                                 \
         return res;                                             \
 }                                                               \
@@ -1403,24 +1403,24 @@ set_c0_##name(unsigned int set)					\
 static inline unsigned int                                      \
 clear_c0_##name(unsigned int clear)                             \
 {                                                               \
-        unsigned int res;                                       \
+        unsigned int res, new;                                  \
                                                                 \
         res = read_c0_##name();                                 \
-        res &= ~clear;                                          \
-        write_c0_##name(res);                                   \
+        new = res & ~clear;                                     \
+        write_c0_##name(new);                                   \
                                                                 \
         return res;                                             \
 }                                                               \
                                                                 \
 static inline unsigned int                                      \
-change_c0_##name(unsigned int change, unsigned int new)         \
+change_c0_##name(unsigned int change, unsigned int val)         \
 {                                                               \
-        unsigned int res;                                       \
+        unsigned int res, new;                                  \
                                                                 \
         res = read_c0_##name();                                 \
-        res &= ~change;                                         \
-        res |= (new & change);                                  \
-        write_c0_##name(res);                                   \
+        new = res & ~change;                                    \
+        new |= (val & change);                                  \
+        write_c0_##name(new);                                   \
                                                                 \
         return res;                                             \
 }
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 1a86f84fa947..49aac6e17df9 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -32,7 +32,6 @@
 #include <linux/module.h>
 #include <linux/binfmts.h>
 #include <linux/security.h>
-#include <linux/syscalls.h>
 #include <linux/compat.h>
 #include <linux/vfs.h>
 #include <linux/ipc.h>
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index b2d7041341b8..29fadaccecdd 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1520,7 +1520,9 @@ void __cpuinit per_cpu_trap_init(void)
 #endif /* CONFIG_MIPS_MT_SMTC */
 
         if (cpu_has_veic || cpu_has_vint) {
+                unsigned long sr = set_c0_status(ST0_BEV);
                 write_c0_ebase(ebase);
+                write_c0_status(sr);
                 /* Setting vector spacing enables EI/VI mode  */
                 change_c0_intctl(0x3e0, VECTORSPACING);
         }
@@ -1602,8 +1604,6 @@ void __cpuinit set_uncached_handler(unsigned long offset, void *addr,
 #ifdef CONFIG_64BIT
         unsigned long uncached_ebase = TO_UNCAC(ebase);
 #endif
-        if (cpu_has_mips_r2)
-                uncached_ebase += (read_c0_ebase() & 0x3ffff000);
 
         if (!addr)
                 panic(panic_null_cerr);
@@ -1635,9 +1635,11 @@ void __init trap_init(void)
                 return; /* Already done */
 #endif
 
-        if (cpu_has_veic || cpu_has_vint)
-                ebase = (unsigned long) alloc_bootmem_low_pages(0x200 + VECTORSPACING*64);
-        else {
+        if (cpu_has_veic || cpu_has_vint) {
+                unsigned long size = 0x200 + VECTORSPACING*64;
+                ebase = (unsigned long)
+                        __alloc_bootmem(size, 1 << fls(size), 0);
+        } else {
                 ebase = CAC_BASE;
                 if (cpu_has_mips_r2)
                         ebase += (read_c0_ebase() & 0x3ffff000);
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index c43f4b26a690..871e828bc62a 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -780,7 +780,7 @@ static void __cpuinit probe_pcache(void)
                 c->dcache.ways = 2;
                 c->dcache.waybit = 0;
 
-                c->options |= MIPS_CPU_CACHE_CDEX_P;
+                c->options |= MIPS_CPU_CACHE_CDEX_P | MIPS_CPU_PREFETCH;
                 break;
 
         case CPU_TX49XX:
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index 546e6977d4ff..bed56f1ac837 100644
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -225,7 +225,7 @@ void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
         if (!plat_device_is_coherent(dev) && direction != DMA_TO_DEVICE) {
                 unsigned long addr;
 
-                addr = plat_dma_addr_to_phys(dma_address);
+                addr = dma_addr_to_virt(dma_address);
                 dma_cache_wback_inv(addr, size);
         }
 
diff --git a/fs/inode.c b/fs/inode.c
index 8a47ccd9fc38..643ac43e5a5c 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1300,6 +1300,40 @@ sector_t bmap(struct inode * inode, sector_t block)
 }
 EXPORT_SYMBOL(bmap);
 
+/*
+ * With relative atime, only update atime if the previous atime is
+ * earlier than either the ctime or mtime or if at least a day has
+ * passed since the last atime update.
+ */
+static int relatime_need_update(struct vfsmount *mnt, struct inode *inode,
+                             struct timespec now)
+{
+
+        if (!(mnt->mnt_flags & MNT_RELATIME))
+                return 1;
+        /*
+         * Is mtime younger than atime? If yes, update atime:
+         */
+        if (timespec_compare(&inode->i_mtime, &inode->i_atime) >= 0)
+                return 1;
+        /*
+         * Is ctime younger than atime? If yes, update atime:
+         */
+        if (timespec_compare(&inode->i_ctime, &inode->i_atime) >= 0)
+                return 1;
+
+        /*
+         * Is the previous atime value older than a day? If yes,
+         * update atime:
+         */
+        if ((long)(now.tv_sec - inode->i_atime.tv_sec) >= 24*60*60)
+                return 1;
+        /*
+         * Good, we can skip the atime update:
+         */
+        return 0;
+}
+
 /**
  *      touch_atime     -       update the access time
  *      @mnt: mount the inode is accessed on
@@ -1327,17 +1361,12 @@ void touch_atime(struct vfsmount *mnt, struct dentry *dentry)
                 goto out;
         if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))
                 goto out;
-        if (mnt->mnt_flags & MNT_RELATIME) {
-                /*
-                 * With relative atime, only update atime if the previous
-                 * atime is earlier than either the ctime or mtime.
-                 */
-                if (timespec_compare(&inode->i_mtime, &inode->i_atime) < 0 &&
-                    timespec_compare(&inode->i_ctime, &inode->i_atime) < 0)
-                        goto out;
-        }
 
         now = current_fs_time(inode->i_sb);
+
+        if (!relatime_need_update(mnt, inode, now))
+                goto out;
+
         if (timespec_equal(&inode->i_atime, &now))
                 goto out;
 
diff --git a/fs/namespace.c b/fs/namespace.c
index 06f8e63f6cb1..f0e753097353 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -780,6 +780,7 @@ static void show_mnt_opts(struct seq_file *m, struct vfsmount *mnt)
                 { MNT_NOATIME, ",noatime" },
                 { MNT_NODIRATIME, ",nodiratime" },
                 { MNT_RELATIME, ",relatime" },
+                { MNT_STRICTATIME, ",strictatime" },
                 { 0, NULL }
         };
         const struct proc_fs_info *fs_infop;
@@ -1919,6 +1920,9 @@ long do_mount(char *dev_name, char *dir_name, char *type_page,
         if (data_page)
                 ((char *)data_page)[PAGE_SIZE - 1] = 0;
 
+        /* Default to relatime */
+        mnt_flags |= MNT_RELATIME;
+
         /* Separate the per-mountpoint flags */
         if (flags & MS_NOSUID)
                 mnt_flags |= MNT_NOSUID;
@@ -1930,13 +1934,14 @@ long do_mount(char *dev_name, char *dir_name, char *type_page,
                 mnt_flags |= MNT_NOATIME;
         if (flags & MS_NODIRATIME)
                 mnt_flags |= MNT_NODIRATIME;
-        if (flags & MS_RELATIME)
-                mnt_flags |= MNT_RELATIME;
+        if (flags & MS_STRICTATIME)
+                mnt_flags &= ~(MNT_RELATIME | MNT_NOATIME);
         if (flags & MS_RDONLY)
                 mnt_flags |= MNT_READONLY;
 
         flags &= ~(MS_NOSUID | MS_NOEXEC | MS_NODEV | MS_ACTIVE |
-                   MS_NOATIME | MS_NODIRATIME | MS_RELATIME| MS_KERNMOUNT);
+                   MS_NOATIME | MS_NODIRATIME | MS_RELATIME| MS_KERNMOUNT |
+                   MS_STRICTATIME);
 
         /* ... and get the mountpoint */
         retval = kern_path(dir_name, LOOKUP_FOLLOW, &path);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 92734c0012e6..5bc81c4a98c1 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -141,6 +141,7 @@ struct inodes_stat_t {
 #define MS_RELATIME     (1<<21) /* Update atime relative to mtime/ctime. */
 #define MS_KERNMOUNT    (1<<22) /* this is a kern_mount call */
 #define MS_I_VERSION    (1<<23) /* Update inode I_version field */
+#define MS_STRICTATIME  (1<<24) /* Always perform atime updates */
 #define MS_ACTIVE       (1<<30)
 #define MS_NOUSER       (1<<31)
 
diff --git a/include/linux/mount.h b/include/linux/mount.h
index cab2a85e2ee8..51f55f903aff 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -27,6 +27,7 @@ struct mnt_namespace;
 #define MNT_NODIRATIME  0x10
 #define MNT_RELATIME    0x20
 #define MNT_READONLY    0x40    /* does the user want this to be r/o? */
+#define MNT_STRICTATIME 0x80
 
 #define MNT_SHRINKABLE  0x100
 #define MNT_IMBALANCED_WRITE_COUNT      0x200 /* just for debugging */
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 74dc57c74349..40ca7cdb653e 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -66,7 +66,7 @@ static inline long sync_writeback_pages(void)
 /*
  * Start background writeback (via pdflush) at this percentage
  */
-int dirty_background_ratio = 5;
+int dirty_background_ratio = 10;
 
 /*
  * dirty_background_bytes starts at 0 (disabled) so that it is a function of
@@ -83,7 +83,7 @@ int vm_highmem_is_dirtyable;
 /*
  * The generator of dirty data starts writeback at this percentage
  */
-int vm_dirty_ratio = 10;
+int vm_dirty_ratio = 20;
 
 /*
  * vm_dirty_bytes starts at 0 (disabled) so that it is a function of