12 files changed, 137 insertions, 99 deletions

diff --git a/arch/sh/boards/board-ap325rxa.c b/arch/sh/boards/board-ap325rxa.c
index caf4c33f4e84..15b6d450fbf0 100644
--- a/arch/sh/boards/board-ap325rxa.c
+++ b/arch/sh/boards/board-ap325rxa.c
@@ -22,6 +22,7 @@
 #include <linux/gpio.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/spi_gpio.h>
+#include <media/soc_camera.h>
 #include <media/soc_camera_platform.h>
 #include <media/sh_mobile_ceu.h>
 #include <video/sh_mobile_lcdc.h>
@@ -216,6 +217,12 @@ static struct platform_device lcdc_device = {
         },
 };
 
+static void camera_power(int val)
+{
+        gpio_set_value(GPIO_PTZ5, val); /* RST_CAM/RSTB */
+        mdelay(10);
+}
+
 #ifdef CONFIG_I2C
 static unsigned char camera_ncm03j_magic[] =
 {
@@ -245,9 +252,11 @@ static int camera_set_capture(struct soc_camera_platform_info *info,
         int ret = 0;
         int i;
 
+        camera_power(0);
         if (!enable)
                 return 0; /* no disable for now */
 
+        camera_power(1);
         for (i = 0; i < ARRAY_SIZE(camera_ncm03j_magic); i += 2) {
                 u_int8_t buf[8];
 
@@ -426,7 +435,7 @@ static int __init ap325rxa_devices_setup(void)
         gpio_request(GPIO_PTZ6, NULL);
         gpio_direction_output(GPIO_PTZ6, 0); /* STBY_CAM */
         gpio_request(GPIO_PTZ5, NULL);
-        gpio_direction_output(GPIO_PTZ5, 1); /* RST_CAM */
+        gpio_direction_output(GPIO_PTZ5, 0); /* RST_CAM */
         gpio_request(GPIO_PTZ4, NULL);
         gpio_direction_output(GPIO_PTZ4, 0); /* SADDR */
 
diff --git a/arch/sh/configs/ap325rxa_defconfig b/arch/sh/configs/ap325rxa_defconfig
index 5c423fa8e6b8..352f87d50fdc 100644
--- a/arch/sh/configs/ap325rxa_defconfig
+++ b/arch/sh/configs/ap325rxa_defconfig
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.28
-# Fri Jan  9 16:54:19 2009
+# Linux kernel version: 2.6.29-rc2
+# Tue Jan 27 11:45:08 2009
 #
 CONFIG_SUPERH=y
 CONFIG_SUPERH32=y
@@ -45,12 +45,12 @@ CONFIG_BSD_PROCESS_ACCT=y
 # CONFIG_AUDIT is not set
 # CONFIG_IKCONFIG is not set
 CONFIG_LOG_BUF_SHIFT=14
-# CONFIG_CGROUPS is not set
 CONFIG_GROUP_SCHED=y
 CONFIG_FAIR_GROUP_SCHED=y
 # CONFIG_RT_GROUP_SCHED is not set
 CONFIG_USER_SCHED=y
 # CONFIG_CGROUP_SCHED is not set
+# CONFIG_CGROUPS is not set
 CONFIG_SYSFS_DEPRECATED=y
 CONFIG_SYSFS_DEPRECATED_V2=y
 # CONFIG_RELAY is not set
@@ -378,6 +378,7 @@ CONFIG_WIRELESS=y
 # CONFIG_WIRELESS_EXT is not set
 # CONFIG_LIB80211 is not set
 # CONFIG_MAC80211 is not set
+# CONFIG_WIMAX is not set
 # CONFIG_RFKILL is not set
 # CONFIG_NET_9P is not set
 
@@ -400,6 +401,7 @@ CONFIG_MTD=y
 # CONFIG_MTD_DEBUG is not set
 CONFIG_MTD_CONCAT=y
 CONFIG_MTD_PARTITIONS=y
+# CONFIG_MTD_TESTS is not set
 # CONFIG_MTD_REDBOOT_PARTS is not set
 CONFIG_MTD_CMDLINE_PARTS=y
 # CONFIG_MTD_AR7_PARTS is not set
@@ -447,9 +449,7 @@ CONFIG_MTD_CFI_UTIL=y
 #
 # CONFIG_MTD_COMPLEX_MAPPINGS is not set
 CONFIG_MTD_PHYSMAP=y
-CONFIG_MTD_PHYSMAP_START=0xffffffff
-CONFIG_MTD_PHYSMAP_LEN=0
-CONFIG_MTD_PHYSMAP_BANKWIDTH=0
+# CONFIG_MTD_PHYSMAP_COMPAT is not set
 # CONFIG_MTD_PLATRAM is not set
 
 #
@@ -480,6 +480,12 @@ CONFIG_MTD_NAND_SH_FLCTL=y
 # CONFIG_MTD_ONENAND is not set
 
 #
+# LPDDR flash memory drivers
+#
+# CONFIG_MTD_LPDDR is not set
+# CONFIG_MTD_QINFO_PROBE is not set
+
+#
 # UBI - Unsorted block images
 #
 CONFIG_MTD_UBI=y
@@ -607,6 +613,10 @@ CONFIG_SMSC911X=y
 # CONFIG_WLAN_PRE80211 is not set
 # CONFIG_WLAN_80211 is not set
 # CONFIG_IWLWIFI_LEDS is not set
+
+#
+# Enable WiMAX (Networking options) to see the WiMAX drivers
+#
 # CONFIG_WAN is not set
 # CONFIG_PPP is not set
 # CONFIG_SLIP is not set
@@ -790,6 +800,7 @@ CONFIG_SSB_POSSIBLE=y
 # CONFIG_PMIC_DA903X is not set
 # CONFIG_MFD_WM8400 is not set
 # CONFIG_MFD_WM8350_I2C is not set
+# CONFIG_MFD_PCF50633 is not set
 # CONFIG_REGULATOR is not set
 
 #
@@ -837,7 +848,7 @@ CONFIG_SOC_CAMERA=y
 # CONFIG_SOC_CAMERA_MT9V022 is not set
 # CONFIG_SOC_CAMERA_TW9910 is not set
 CONFIG_SOC_CAMERA_PLATFORM=y
-# CONFIG_SOC_CAMERA_OV772X is not set
+CONFIG_SOC_CAMERA_OV772X=y
 CONFIG_VIDEO_SH_MOBILE_CEU=y
 # CONFIG_RADIO_ADAPTERS is not set
 # CONFIG_DAB is not set
@@ -1012,6 +1023,7 @@ CONFIG_FS_POSIX_ACL=y
 CONFIG_FILE_LOCKING=y
 # CONFIG_XFS_FS is not set
 # CONFIG_OCFS2_FS is not set
+# CONFIG_BTRFS_FS is not set
 CONFIG_DNOTIFY=y
 CONFIG_INOTIFY=y
 CONFIG_INOTIFY_USER=y
@@ -1060,6 +1072,7 @@ CONFIG_MISC_FILESYSTEMS=y
 # CONFIG_JFFS2_FS is not set
 # CONFIG_UBIFS_FS is not set
 # CONFIG_CRAMFS is not set
+# CONFIG_SQUASHFS is not set
 # CONFIG_VXFS_FS is not set
 # CONFIG_MINIX_FS is not set
 # CONFIG_OMFS_FS is not set
diff --git a/arch/sh/configs/migor_defconfig b/arch/sh/configs/migor_defconfig
index 7758263514bc..678576796bdf 100644
--- a/arch/sh/configs/migor_defconfig
+++ b/arch/sh/configs/migor_defconfig
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.28
-# Fri Jan  9 17:09:35 2009
+# Linux kernel version: 2.6.29-rc1
+# Thu Jan 22 09:16:16 2009
 #
 CONFIG_SUPERH=y
 CONFIG_SUPERH32=y
@@ -45,8 +45,12 @@ CONFIG_SYSVIPC_SYSCTL=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=14
-# CONFIG_CGROUPS is not set
 # CONFIG_GROUP_SCHED is not set
+
+#
+# Control Group support
+#
+# CONFIG_CGROUPS is not set
 CONFIG_SYSFS_DEPRECATED=y
 CONFIG_SYSFS_DEPRECATED_V2=y
 # CONFIG_RELAY is not set
@@ -389,6 +393,7 @@ CONFIG_WIRELESS_EXT=y
 CONFIG_WIRELESS_EXT_SYSFS=y
 # CONFIG_LIB80211 is not set
 # CONFIG_MAC80211 is not set
+# CONFIG_WIMAX is not set
 # CONFIG_RFKILL is not set
 # CONFIG_NET_9P is not set
 
@@ -411,6 +416,7 @@ CONFIG_MTD=y
 # CONFIG_MTD_DEBUG is not set
 CONFIG_MTD_CONCAT=y
 CONFIG_MTD_PARTITIONS=y
+# CONFIG_MTD_TESTS is not set
 # CONFIG_MTD_REDBOOT_PARTS is not set
 CONFIG_MTD_CMDLINE_PARTS=y
 # CONFIG_MTD_AR7_PARTS is not set
@@ -458,9 +464,7 @@ CONFIG_MTD_CFI_UTIL=y
 #
 # CONFIG_MTD_COMPLEX_MAPPINGS is not set
 CONFIG_MTD_PHYSMAP=y
-CONFIG_MTD_PHYSMAP_START=0xffffffff
-CONFIG_MTD_PHYSMAP_LEN=0
-CONFIG_MTD_PHYSMAP_BANKWIDTH=0
+# CONFIG_MTD_PHYSMAP_COMPAT is not set
 # CONFIG_MTD_PLATRAM is not set
 
 #
@@ -488,6 +492,12 @@ CONFIG_MTD_NAND_PLATFORM=y
 # CONFIG_MTD_ONENAND is not set
 
 #
+# LPDDR flash memory drivers
+#
+# CONFIG_MTD_LPDDR is not set
+# CONFIG_MTD_QINFO_PROBE is not set
+
+#
 # UBI - Unsorted block images
 #
 # CONFIG_MTD_UBI is not set
@@ -587,6 +597,10 @@ CONFIG_SMC91X=y
 # CONFIG_WLAN_PRE80211 is not set
 # CONFIG_WLAN_80211 is not set
 # CONFIG_IWLWIFI_LEDS is not set
+
+#
+# Enable WiMAX (Networking options) to see the WiMAX drivers
+#
 # CONFIG_WAN is not set
 # CONFIG_PPP is not set
 # CONFIG_SLIP is not set
@@ -761,6 +775,7 @@ CONFIG_SSB_POSSIBLE=y
 # CONFIG_PMIC_DA903X is not set
 # CONFIG_MFD_WM8400 is not set
 # CONFIG_MFD_WM8350_I2C is not set
+# CONFIG_MFD_PCF50633 is not set
 # CONFIG_REGULATOR is not set
 
 #
@@ -806,9 +821,9 @@ CONFIG_SOC_CAMERA=y
 # CONFIG_SOC_CAMERA_MT9M111 is not set
 # CONFIG_SOC_CAMERA_MT9T031 is not set
 # CONFIG_SOC_CAMERA_MT9V022 is not set
-# CONFIG_SOC_CAMERA_TW9910 is not set
-CONFIG_SOC_CAMERA_PLATFORM=y
-# CONFIG_SOC_CAMERA_OV772X is not set
+CONFIG_SOC_CAMERA_TW9910=y
+# CONFIG_SOC_CAMERA_PLATFORM is not set
+CONFIG_SOC_CAMERA_OV772X=y
 CONFIG_VIDEO_SH_MOBILE_CEU=y
 # CONFIG_RADIO_ADAPTERS is not set
 # CONFIG_DAB is not set
@@ -866,11 +881,13 @@ CONFIG_USB_GADGET_SELECTED=y
 # CONFIG_USB_GADGET_PXA25X is not set
 # CONFIG_USB_GADGET_PXA27X is not set
 # CONFIG_USB_GADGET_S3C2410 is not set
+# CONFIG_USB_GADGET_IMX is not set
 CONFIG_USB_GADGET_M66592=y
 CONFIG_USB_M66592=y
 CONFIG_SUPERH_BUILT_IN_M66592=y
 # CONFIG_USB_GADGET_AMD5536UDC is not set
 # CONFIG_USB_GADGET_FSL_QE is not set
+# CONFIG_USB_GADGET_CI13XXX is not set
 # CONFIG_USB_GADGET_NET2280 is not set
 # CONFIG_USB_GADGET_GOKU is not set
 # CONFIG_USB_GADGET_DUMMY_HCD is not set
@@ -883,6 +900,11 @@ CONFIG_USB_G_SERIAL=y
 # CONFIG_USB_MIDI_GADGET is not set
 # CONFIG_USB_G_PRINTER is not set
 # CONFIG_USB_CDC_COMPOSITE is not set
+
+#
+# OTG and related infrastructure
+#
+# CONFIG_USB_GPIO_VBUS is not set
 # CONFIG_MMC is not set
 # CONFIG_MEMSTICK is not set
 # CONFIG_NEW_LEDS is not set
@@ -961,6 +983,7 @@ CONFIG_UIO_PDRV_GENIRQ=y
 CONFIG_FILE_LOCKING=y
 # CONFIG_XFS_FS is not set
 # CONFIG_OCFS2_FS is not set
+# CONFIG_BTRFS_FS is not set
 # CONFIG_DNOTIFY is not set
 # CONFIG_INOTIFY is not set
 # CONFIG_QUOTA is not set
@@ -1004,6 +1027,7 @@ CONFIG_MISC_FILESYSTEMS=y
 # CONFIG_EFS_FS is not set
 # CONFIG_JFFS2_FS is not set
 # CONFIG_CRAMFS is not set
+# CONFIG_SQUASHFS is not set
 # CONFIG_VXFS_FS is not set
 # CONFIG_MINIX_FS is not set
 # CONFIG_OMFS_FS is not set
diff --git a/arch/sh/include/asm/mutex-llsc.h b/arch/sh/include/asm/mutex-llsc.h
index ee839ee58ac8..090358a7e1bb 100644
--- a/arch/sh/include/asm/mutex-llsc.h
+++ b/arch/sh/include/asm/mutex-llsc.h
@@ -21,38 +21,36 @@
 static inline void
 __mutex_fastpath_lock(atomic_t *count, void (*fail_fn)(atomic_t *))
 {
-        int __ex_flag, __res;
+        int __done, __res;
 
         __asm__ __volatile__ (
                 "movli.l        @%2, %0 \n"
                 "add            #-1, %0 \n"
                 "movco.l        %0, @%2 \n"
                 "movt           %1      \n"
-                : "=&z" (__res), "=&r" (__ex_flag)
+                : "=&z" (__res), "=&r" (__done)
                 : "r" (&(count)->counter)
                 : "t");
 
-        __res |= !__ex_flag;
-        if (unlikely(__res != 0))
+        if (unlikely(!__done || __res != 0))
                 fail_fn(count);
 }
 
 static inline int
 __mutex_fastpath_lock_retval(atomic_t *count, int (*fail_fn)(atomic_t *))
 {
-        int __ex_flag, __res;
+        int __done, __res;
 
         __asm__ __volatile__ (
                 "movli.l        @%2, %0 \n"
                 "add            #-1, %0 \n"
                 "movco.l        %0, @%2 \n"
                 "movt           %1      \n"
-                : "=&z" (__res), "=&r" (__ex_flag)
+                : "=&z" (__res), "=&r" (__done)
                 : "r" (&(count)->counter)
                 : "t");
 
-        __res |= !__ex_flag;
-        if (unlikely(__res != 0))
+        if (unlikely(!__done || __res != 0))
                 __res = fail_fn(count);
 
         return __res;
@@ -61,19 +59,18 @@ __mutex_fastpath_lock_retval(atomic_t *count, int (*fail_fn)(atomic_t *))
 static inline void
 __mutex_fastpath_unlock(atomic_t *count, void (*fail_fn)(atomic_t *))
 {
-        int __ex_flag, __res;
+        int __done, __res;
 
         __asm__ __volatile__ (
                 "movli.l        @%2, %0 \n\t"
                 "add            #1, %0  \n\t"
                 "movco.l        %0, @%2 \n\t"
                 "movt           %1      \n\t"
-                : "=&z" (__res), "=&r" (__ex_flag)
+                : "=&z" (__res), "=&r" (__done)
                 : "r" (&(count)->counter)
                 : "t");
 
-        __res |= !__ex_flag;
-        if (unlikely(__res <= 0))
+        if (unlikely(!__done || __res <= 0))
                 fail_fn(count);
 }
 
diff --git a/arch/sh/include/asm/syscall_32.h b/arch/sh/include/asm/syscall_32.h
index 05a868a71ef5..5bc34681d994 100644
--- a/arch/sh/include/asm/syscall_32.h
+++ b/arch/sh/include/asm/syscall_32.h
@@ -21,23 +21,10 @@ static inline void syscall_rollback(struct task_struct *task,
          */
 }
 
-static inline bool syscall_has_error(struct pt_regs *regs)
-{
-        return (regs->sr & 0x1) ? true : false;
-}
-static inline void syscall_set_error(struct pt_regs *regs)
-{
-        regs->sr |= 0x1;
-}
-static inline void syscall_clear_error(struct pt_regs *regs)
-{
-        regs->sr &= ~0x1;
-}
-
 static inline long syscall_get_error(struct task_struct *task,
                                      struct pt_regs *regs)
 {
-        return syscall_has_error(regs) ? regs->regs[0] : 0;
+        return IS_ERR_VALUE(regs->regs[0]) ? regs->regs[0] : 0;
 }
 
 static inline long syscall_get_return_value(struct task_struct *task,
@@ -50,13 +37,10 @@ static inline void syscall_set_return_value(struct task_struct *task,
                                             struct pt_regs *regs,
                                             int error, long val)
 {
-        if (error) {
-                syscall_set_error(regs);
+        if (error)
                 regs->regs[0] = -error;
-        } else {
-                syscall_clear_error(regs);
+        else
                 regs->regs[0] = val;
-        }
 }
 
 static inline void syscall_get_arguments(struct task_struct *task,
diff --git a/arch/sh/include/asm/syscall_64.h b/arch/sh/include/asm/syscall_64.h
index e1143b9784d6..c3561ca72bee 100644
--- a/arch/sh/include/asm/syscall_64.h
+++ b/arch/sh/include/asm/syscall_64.h
@@ -21,23 +21,10 @@ static inline void syscall_rollback(struct task_struct *task,
          */
 }
 
-static inline bool syscall_has_error(struct pt_regs *regs)
-{
-        return (regs->sr & 0x1) ? true : false;
-}
-static inline void syscall_set_error(struct pt_regs *regs)
-{
-        regs->sr |= 0x1;
-}
-static inline void syscall_clear_error(struct pt_regs *regs)
-{
-        regs->sr &= ~0x1;
-}
-
 static inline long syscall_get_error(struct task_struct *task,
                                      struct pt_regs *regs)
 {
-        return syscall_has_error(regs) ? regs->regs[9] : 0;
+        return IS_ERR_VALUE(regs->regs[9]) ? regs->regs[9] : 0;
 }
 
 static inline long syscall_get_return_value(struct task_struct *task,
@@ -50,13 +37,10 @@ static inline void syscall_set_return_value(struct task_struct *task,
                                             struct pt_regs *regs,
                                             int error, long val)
 {
-        if (error) {
-                syscall_set_error(regs);
+        if (error)
                 regs->regs[9] = -error;
-        } else {
-                syscall_clear_error(regs);
+        else
                 regs->regs[9] = val;
-        }
 }
 
 static inline void syscall_get_arguments(struct task_struct *task,
diff --git a/arch/sh/kernel/cpu/sh2a/clock-sh7201.c b/arch/sh/kernel/cpu/sh2a/clock-sh7201.c
index 020a96fe961a..4a5e59732334 100644
--- a/arch/sh/kernel/cpu/sh2a/clock-sh7201.c
+++ b/arch/sh/kernel/cpu/sh2a/clock-sh7201.c
@@ -18,8 +18,8 @@
 #include <asm/freq.h>
 #include <asm/io.h>
 
-const static int pll1rate[]={1,2,3,4,6,8};
-const static int pfc_divisors[]={1,2,3,4,6,8,12};
+static const int pll1rate[]={1,2,3,4,6,8};
+static const int pfc_divisors[]={1,2,3,4,6,8,12};
 #define ifc_divisors pfc_divisors
 
 #if (CONFIG_SH_CLK_MD == 0)
diff --git a/arch/sh/kernel/cpu/sh4/fpu.c b/arch/sh/kernel/cpu/sh4/fpu.c
index 2780917c0088..e3ea5411da6d 100644
--- a/arch/sh/kernel/cpu/sh4/fpu.c
+++ b/arch/sh/kernel/cpu/sh4/fpu.c
@@ -423,7 +423,7 @@ static int ieee_fpe_handler(struct pt_regs *regs)
                 int m;
                 unsigned int hx;
 
-                m = (finsn >> 9) & 0x7;
+                m = (finsn >> 8) & 0x7;
                 hx = tsk->thread.fpu.hard.fp_regs[m];
 
                 if ((tsk->thread.fpu.hard.fpscr & FPSCR_CAUSE_ERROR)
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 534247508572..370d2cfa34eb 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -262,11 +262,11 @@ void __init setup_bootmem_allocator(unsigned long free_pfn)
                         BOOTMEM_DEFAULT);
 
         /*
-         * reserve physical page 0 - it's a special BIOS page on many boxes,
-         * enabling clean reboots, SMP operation, laptop functions.
+         * Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET.
          */
-        reserve_bootmem(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET,
-                        BOOTMEM_DEFAULT);
+        if (CONFIG_ZERO_PAGE_OFFSET != 0)
+                reserve_bootmem(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET,
+                                BOOTMEM_DEFAULT);
 
         sparse_memory_present_with_active_regions(0);
 
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index 77c21bde376a..17784e19ae34 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -510,7 +510,6 @@ handle_syscall_restart(unsigned long save_r0, struct pt_regs *regs,
                 case -ERESTARTNOHAND:
                 no_system_call_restart:
                         regs->regs[0] = -EINTR;
-                        regs->sr |= 1;
                         break;
 
                 case -ERESTARTSYS:
@@ -589,8 +588,7 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
 
         signr = get_signal_to_deliver(&info, &ka, regs, NULL);
         if (signr > 0) {
-                if (regs->sr & 1)
-                        handle_syscall_restart(save_r0, regs, &ka.sa);
+                handle_syscall_restart(save_r0, regs, &ka.sa);
 
                 /* Whee!  Actually deliver the signal.  */
                 if (handle_signal(signr, &ka, &info, oldset,
diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c
index b22fdfaaa191..0663a0ee6021 100644
--- a/arch/sh/kernel/signal_64.c
+++ b/arch/sh/kernel/signal_64.c
@@ -60,7 +60,6 @@ handle_syscall_restart(struct pt_regs *regs, struct sigaction *sa)
                 case -ERESTARTNOHAND:
                 no_system_call_restart:
                         regs->regs[REG_RET] = -EINTR;
-                        regs->sr |= 1;
                         break;
 
                 case -ERESTARTSYS:
@@ -109,8 +108,7 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset)
 
         signr = get_signal_to_deliver(&info, &ka, regs, 0);
         if (signr > 0) {
-                if (regs->sr & 1)
-                        handle_syscall_restart(regs, &ka.sa);
+                handle_syscall_restart(regs, &ka.sa);
 
                 /* Whee!  Actually deliver the signal.  */
                 if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
diff --git a/arch/sh/lib/checksum.S b/arch/sh/lib/checksum.S
index cbdd0d40e545..356c8ec92893 100644
--- a/arch/sh/lib/checksum.S
+++ b/arch/sh/lib/checksum.S
@@ -36,8 +36,7 @@
  */
 
 /*      
- * unsigned int csum_partial(const unsigned char *buf, int len,
- *                           unsigned int sum);
+ * asmlinkage __wsum csum_partial(const void *buf, int len, __wsum sum);
  */
 
 .text
@@ -49,11 +48,31 @@ ENTRY(csum_partial)
            * Fortunately, it is easy to convert 2-byte alignment to 4-byte
            * alignment for the unrolled loop.
            */
-        mov     r5, r1
         mov     r4, r0
-        tst     #2, r0          ! Check alignment.
-        bt      2f              ! Jump if alignment is ok.
+        tst     #3, r0          ! Check alignment.
+        bt/s    2f              ! Jump if alignment is ok.
+         mov    r4, r7          ! Keep a copy to check for alignment
         !
+        tst     #1, r0          ! Check alignment.
+        bt      21f             ! Jump if alignment is boundary of 2bytes.
+
+        ! buf is odd
+        tst     r5, r5
+        add     #-1, r5
+        bt      9f
+        mov.b   @r4+, r0
+        extu.b  r0, r0
+        addc    r0, r6          ! t=0 from previous tst
+        mov     r6, r0
+        shll8   r6
+        shlr16  r0
+        shlr8   r0
+        or      r0, r6
+        mov     r4, r0
+        tst     #2, r0
+        bt      2f
+21:
+        ! buf is 2 byte aligned (len could be 0)
         add     #-2, r5         ! Alignment uses up two bytes.
         cmp/pz  r5              !
         bt/s    1f              ! Jump if we had at least two bytes.
@@ -61,16 +80,17 @@ ENTRY(csum_partial)
         bra     6f
          add    #2, r5          ! r5 was < 2.  Deal with it.
 1:
-        mov     r5, r1          ! Save new len for later use.
         mov.w   @r4+, r0
         extu.w  r0, r0
         addc    r0, r6
         bf      2f
         add     #1, r6
 2:
+        ! buf is 4 byte aligned (len could be 0)
+        mov     r5, r1
         mov     #-5, r0
-        shld    r0, r5
-        tst     r5, r5
+        shld    r0, r1
+        tst     r1, r1
         bt/s    4f              ! if it's =0, go to 4f
          clrt
         .align  2
@@ -92,30 +112,31 @@ ENTRY(csum_partial)
         addc    r0, r6
         addc    r2, r6
         movt    r0
-        dt      r5
+        dt      r1
         bf/s    3b
          cmp/eq #1, r0
-        ! here, we know r5==0
-        addc    r5, r6                  ! add carry to r6
+        ! here, we know r1==0
+        addc    r1, r6                  ! add carry to r6
 4:
-        mov     r1, r0
+        mov     r5, r0
         and     #0x1c, r0
         tst     r0, r0
-        bt/s    6f
-         mov    r0, r5
-        shlr2   r5
+        bt      6f
+        ! 4 bytes or more remaining
+        mov     r0, r1
+        shlr2   r1
         mov     #0, r2
 5:
         addc    r2, r6
         mov.l   @r4+, r2
         movt    r0
-        dt      r5
+        dt      r1
         bf/s    5b
          cmp/eq #1, r0
         addc    r2, r6
-        addc    r5, r6          ! r5==0 here, so it means add carry-bit
+        addc    r1, r6          ! r1==0 here, so it means add carry-bit
 6:
-        mov     r1, r5
+        ! 3 bytes or less remaining
         mov     #3, r0
         and     r0, r5
         tst     r5, r5
@@ -139,8 +160,18 @@ ENTRY(csum_partial)
 8:
         addc    r0, r6
         mov     #0, r0
-        addc    r0, r6 
+        addc    r0, r6
 9:
+        ! Check if the buffer was misaligned, if so realign sum
+        mov     r7, r0
+        tst     #1, r0
+        bt      10f
+        mov     r6, r0
+        shll8   r6
+        shlr16  r0
+        shlr8   r0
+        or      r0, r6
+10:
         rts
          mov    r6, r0