10 files changed, 49 insertions, 185 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 1aad0d9f5074..fd7620f025fa 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -358,7 +358,14 @@ config SGI_IP22
         select SWAP_IO_SPACE
         select SYS_HAS_CPU_R4X00
         select SYS_HAS_CPU_R5000
-        select SYS_HAS_EARLY_PRINTK
+        #
+        # Disable EARLY_PRINTK for now since it leads to overwritten prom
+        # memory during early boot on some machines.
+        #
+        # See http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20091119164009.GA15038%40deprecation.cyrius.com
+        # for a more details discussion
+        #
+        # select SYS_HAS_EARLY_PRINTK
         select SYS_SUPPORTS_32BIT_KERNEL
         select SYS_SUPPORTS_64BIT_KERNEL
         select SYS_SUPPORTS_BIG_ENDIAN
@@ -410,7 +417,14 @@ config SGI_IP28
         select SGI_HAS_ZILOG
         select SWAP_IO_SPACE
         select SYS_HAS_CPU_R10000
-        select SYS_HAS_EARLY_PRINTK
+        #
+        # Disable EARLY_PRINTK for now since it leads to overwritten prom
+        # memory during early boot on some machines.
+        #
+        # See http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20091119164009.GA15038%40deprecation.cyrius.com
+        # for a more details discussion
+        #
+        # select SYS_HAS_EARLY_PRINTK
         select SYS_SUPPORTS_64BIT_KERNEL
         select SYS_SUPPORTS_BIG_ENDIAN
       help
@@ -1439,6 +1453,7 @@ choice
 
 config PAGE_SIZE_4KB
         bool "4kB"
+        depends on !CPU_LOONGSON2
         help
          This option select the standard 4kB Linux page size.  On some
          R3000-family processors this is the only available page size.  Using
@@ -1763,7 +1778,7 @@ config SYS_SUPPORTS_SMARTMIPS
 
 config ARCH_FLATMEM_ENABLE
         def_bool y
-        depends on !NUMA
+        depends on !NUMA && !CPU_LOONGSON2
 
 config ARCH_DISCONTIGMEM_ENABLE
         bool
diff --git a/arch/mips/include/asm/bug.h b/arch/mips/include/asm/bug.h
index 6cf29c26e873..540c98a810d1 100644
--- a/arch/mips/include/asm/bug.h
+++ b/arch/mips/include/asm/bug.h
@@ -11,9 +11,7 @@
 static inline void __noreturn BUG(void)
 {
         __asm__ __volatile__("break %0" : : "i" (BRK_BUG));
-        /* Fool GCC into thinking the function doesn't return. */
-        while (1)
-                ;
+        unreachable();
 }
 
 #define HAVE_ARCH_BUG
diff --git a/arch/mips/include/asm/mman.h b/arch/mips/include/asm/mman.h
index a2250f390a29..c892bfb3e2c1 100644
--- a/arch/mips/include/asm/mman.h
+++ b/arch/mips/include/asm/mman.h
@@ -75,6 +75,7 @@
 
 #define MADV_MERGEABLE   12             /* KSM may merge identical pages */
 #define MADV_UNMERGEABLE 13             /* KSM may not merge identical pages */
+#define MADV_HWPOISON    100            /* poison a page for testing */
 
 /* compatibility flags */
 #define MAP_FILE        0
diff --git a/arch/mips/include/asm/system.h b/arch/mips/include/asm/system.h
index fcf5f98d90cc..83b5509e09e8 100644
--- a/arch/mips/include/asm/system.h
+++ b/arch/mips/include/asm/system.h
@@ -12,6 +12,7 @@
 #ifndef _ASM_SYSTEM_H
 #define _ASM_SYSTEM_H
 
+#include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/irqflags.h>
 
@@ -193,10 +194,6 @@ extern __u64 __xchg_u64_unsupported_on_32bit_kernels(volatile __u64 * m, __u64 v
 #define __xchg_u64 __xchg_u64_unsupported_on_32bit_kernels
 #endif
 
-/* This function doesn't exist, so you'll get a linker error
-   if something tries to do an invalid xchg().  */
-extern void __xchg_called_with_bad_pointer(void);
-
 static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
 {
         switch (size) {
@@ -205,11 +202,17 @@ static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int siz
         case 8:
                 return __xchg_u64(ptr, x);
         }
-        __xchg_called_with_bad_pointer();
+
         return x;
 }
 
-#define xchg(ptr, x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
+#define xchg(ptr, x)                                                    \
+({                                                                      \
+        BUILD_BUG_ON(sizeof(*(ptr)) & ~0xc);                            \
+                                                                        \
+        ((__typeof__(*(ptr)))                                           \
+                __xchg((unsigned long)(x), (ptr), sizeof(*(ptr))));     \
+})
 
 extern void set_handler(unsigned long offset, void *addr, unsigned long len);
 extern void set_uncached_handler(unsigned long offset, void *addr, unsigned long len);
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index b77fefaff9da..1a2793efdc4e 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -265,67 +265,6 @@ SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz,
 }
 #endif
 
-struct sysctl_args32
-{
-        compat_caddr_t name;
-        int nlen;
-        compat_caddr_t oldval;
-        compat_caddr_t oldlenp;
-        compat_caddr_t newval;
-        compat_size_t newlen;
-        unsigned int __unused[4];
-};
-
-#ifdef CONFIG_SYSCTL_SYSCALL
-
-SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args)
-{
-        struct sysctl_args32 tmp;
-        int error;
-        size_t oldlen;
-        size_t __user *oldlenp = NULL;
-        unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
-
-        if (copy_from_user(&tmp, args, sizeof(tmp)))
-                return -EFAULT;
-
-        if (tmp.oldval && tmp.oldlenp) {
-                /* Duh, this is ugly and might not work if sysctl_args
-                   is in read-only memory, but do_sysctl does indirectly
-                   a lot of uaccess in both directions and we'd have to
-                   basically copy the whole sysctl.c here, and
-                   glibc's __sysctl uses rw memory for the structure
-                   anyway.  */
-                if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) ||
-                    put_user(oldlen, (size_t __user *)addr))
-                        return -EFAULT;
-                oldlenp = (size_t __user *)addr;
-        }
-
-        lock_kernel();
-        error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval),
-                          oldlenp, (void __user *)A(tmp.newval), tmp.newlen);
-        unlock_kernel();
-        if (oldlenp) {
-                if (!error) {
-                        if (get_user(oldlen, (size_t __user *)addr) ||
-                            put_user(oldlen, (u32 __user *)A(tmp.oldlenp)))
-                                error = -EFAULT;
-                }
-                copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
-        }
-        return error;
-}
-
-#else
-
-SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args)
-{
-        return -ENOSYS;
-}
-
-#endif /* CONFIG_SYSCTL_SYSCALL */
-
 SYSCALL_DEFINE1(32_newuname, struct new_utsname __user *, name)
 {
         int ret = 0;
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index 6ebc07976694..8a0be0bdebad 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -272,7 +272,7 @@ EXPORT(sysn32_call_table)
         PTR     sys_munlockall
         PTR     sys_vhangup                     /* 6150 */
         PTR     sys_pivot_root
-        PTR     sys_32_sysctl
+        PTR     compat_sys_sysctl
         PTR     sys_prctl
         PTR     compat_sys_adjtimex
         PTR     compat_sys_setrlimit            /* 6155 */
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 14dde4ca932e..41dbdb7d67e5 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -356,7 +356,7 @@ sys_call_table:
         PTR     sys_ni_syscall                  /* 4150 */
         PTR     sys_getsid
         PTR     sys_fdatasync
-        PTR     sys_32_sysctl
+        PTR     compat_sys_sysctl
         PTR     sys_mlock
         PTR     sys_munlock                     /* 4155 */
         PTR     sys_mlockall
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 3fe1fcfa2e73..fe0d79805603 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -306,6 +306,7 @@ static inline int mips_atomic_set(struct pt_regs *regs,
 
         if (cpu_has_llsc && R10000_LLSC_WAR) {
                 __asm__ __volatile__ (
+                "       .set    mips3                                   \n"
                 "       li      %[err], 0                               \n"
                 "1:     ll      %[old], (%[addr])                       \n"
                 "       move    %[tmp], %[new]                          \n"
@@ -320,6 +321,7 @@ static inline int mips_atomic_set(struct pt_regs *regs,
                 "       "STR(PTR)"      1b, 4b                          \n"
                 "       "STR(PTR)"      2b, 4b                          \n"
                 "       .previous                                       \n"
+                "       .set    mips0                                   \n"
                 : [old] "=&r" (old),
                   [err] "=&r" (err),
                   [tmp] "=&r" (tmp)
@@ -329,6 +331,7 @@ static inline int mips_atomic_set(struct pt_regs *regs,
                 : "memory");
         } else if (cpu_has_llsc) {
                 __asm__ __volatile__ (
+                "       .set    mips3                                   \n"
                 "       li      %[err], 0                               \n"
                 "1:     ll      %[old], (%[addr])                       \n"
                 "       move    %[tmp], %[new]                          \n"
@@ -347,6 +350,7 @@ static inline int mips_atomic_set(struct pt_regs *regs,
                 "       "STR(PTR)"      1b, 5b                          \n"
                 "       "STR(PTR)"      2b, 5b                          \n"
                 "       .previous                                       \n"
+                "       .set    mips0                                   \n"
                 : [old] "=&r" (old),
                   [err] "=&r" (err),
                   [tmp] "=&r" (tmp)
diff --git a/arch/mips/lasat/sysctl.c b/arch/mips/lasat/sysctl.c
index b3deed8db619..14b9a28a4aec 100644
--- a/arch/mips/lasat/sysctl.c
+++ b/arch/mips/lasat/sysctl.c
@@ -37,23 +37,6 @@
 #include "ds1603.h"
 #endif
 
-/* Strategy function to write EEPROM after changing string entry */
-int sysctl_lasatstring(ctl_table *table,
-                void *oldval, size_t *oldlenp,
-                void *newval, size_t newlen)
-{
-        int r;
-
-        r = sysctl_string(table, oldval, oldlenp, newval, newlen);
-        if (r < 0)
-                return r;
-
-        if (newval && newlen)
-                lasat_write_eeprom_info();
-
-        return 0;
-}
-
 
 /* And the same for proc */
 int proc_dolasatstring(ctl_table *table, int write,
@@ -113,46 +96,6 @@ int proc_dolasatrtc(ctl_table *table, int write,
 }
 #endif
 
-/* Sysctl for setting the IP addresses */
-int sysctl_lasat_intvec(ctl_table *table,
-                    void *oldval, size_t *oldlenp,
-                    void *newval, size_t newlen)
-{
-        int r;
-
-        r = sysctl_intvec(table, oldval, oldlenp, newval, newlen);
-        if (r < 0)
-                return r;
-
-        if (newval && newlen)
-                lasat_write_eeprom_info();
-
-        return 0;
-}
-
-#ifdef CONFIG_DS1603
-/* Same for RTC */
-int sysctl_lasat_rtc(ctl_table *table,
-                    void *oldval, size_t *oldlenp,
-                    void *newval, size_t newlen)
-{
-        struct timespec ts;
-        int r;
-
-        read_persistent_clock(&ts);
-        rtctmp = ts.tv_sec;
-        if (rtctmp < 0)
-                rtctmp = 0;
-        r = sysctl_intvec(table, oldval, oldlenp, newval, newlen);
-        if (r < 0)
-                return r;
-        if (newval && newlen)
-                rtc_mips_set_mmss(rtctmp);
-
-        return r;
-}
-#endif
-
 #ifdef CONFIG_INET
 int proc_lasat_ip(ctl_table *table, int write,
                        void *buffer, size_t *lenp, loff_t *ppos)
@@ -214,23 +157,6 @@ int proc_lasat_ip(ctl_table *table, int write,
 }
 #endif
 
-static int sysctl_lasat_prid(ctl_table *table,
-                                     void *oldval, size_t *oldlenp,
-                                     void *newval, size_t newlen)
-{
-        int r;
-
-        r = sysctl_intvec(table, oldval, oldlenp, newval, newlen);
-        if (r < 0)
-                return r;
-        if (newval && newlen) {
-                lasat_board_info.li_eeprom_info.prid = *(int *)newval;
-                lasat_write_eeprom_info();
-                lasat_init_board_info();
-        }
-        return 0;
-}
-
 int proc_lasat_prid(ctl_table *table, int write,
                        void *buffer, size_t *lenp, loff_t *ppos)
 {
@@ -252,115 +178,92 @@ extern int lasat_boot_to_service;
 
 static ctl_table lasat_table[] = {
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "cpu-hz",
                 .data           = &lasat_board_info.li_cpu_hz,
                 .maxlen         = sizeof(int),
                 .mode           = 0444,
-                .proc_handler   = &proc_dointvec,
-                .strategy       = &sysctl_intvec
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "bus-hz",
                 .data           = &lasat_board_info.li_bus_hz,
                 .maxlen         = sizeof(int),
                 .mode           = 0444,
-                .proc_handler   = &proc_dointvec,
-                .strategy       = &sysctl_intvec
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "bmid",
                 .data           = &lasat_board_info.li_bmid,
                 .maxlen         = sizeof(int),
                 .mode           = 0444,
-                .proc_handler   = &proc_dointvec,
-                .strategy       = &sysctl_intvec
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "prid",
                 .data           = &lasat_board_info.li_prid,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_lasat_prid,
-                .strategy       = &sysctl_lasat_prid
-        },
+                .proc_handler   = proc_lasat_prid,
+.       },
 #ifdef CONFIG_INET
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "ipaddr",
                 .data           = &lasat_board_info.li_eeprom_info.ipaddr,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_lasat_ip,
-                .strategy       = &sysctl_lasat_intvec
+                .proc_handler   = proc_lasat_ip,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "netmask",
                 .data           = &lasat_board_info.li_eeprom_info.netmask,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_lasat_ip,
-                .strategy       = &sysctl_lasat_intvec
+                .proc_handler   = proc_lasat_ip,
         },
 #endif
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "passwd_hash",
                 .data           = &lasat_board_info.li_eeprom_info.passwd_hash,
                 .maxlen         =
                         sizeof(lasat_board_info.li_eeprom_info.passwd_hash),
                 .mode           = 0600,
-                .proc_handler   = &proc_dolasatstring,
-                .strategy       = &sysctl_lasatstring
+                .proc_handler   = proc_dolasatstring,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "boot-service",
                 .data           = &lasat_boot_to_service,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
-                .strategy       = &sysctl_intvec
+                .proc_handler   = proc_dointvec,
         },
 #ifdef CONFIG_DS1603
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "rtc",
                 .data           = &rtctmp,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dolasatrtc,
-                .strategy       = &sysctl_lasat_rtc
+                .proc_handler   = proc_dolasatrtc,
         },
 #endif
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "namestr",
                 .data           = &lasat_board_info.li_namestr,
                 .maxlen         = sizeof(lasat_board_info.li_namestr),
                 .mode           = 0444,
-                .proc_handler   = &proc_dostring,
-                .strategy       = &sysctl_string
+                .proc_handler   = proc_dostring,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "typestr",
                 .data           = &lasat_board_info.li_typestr,
                 .maxlen         = sizeof(lasat_board_info.li_typestr),
                 .mode           = 0444,
-                .proc_handler   = &proc_dostring,
-                .strategy       = &sysctl_string
+                .proc_handler   = proc_dostring,
         },
         {}
 };
 
 static ctl_table lasat_root_table[] = {
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "lasat",
                 .mode           =  0555,
                 .child          = lasat_table
diff --git a/arch/mips/rb532/devices.c b/arch/mips/rb532/devices.c
index 9f40e1ff9b4f..041fc1afc3f4 100644
--- a/arch/mips/rb532/devices.c
+++ b/arch/mips/rb532/devices.c
@@ -110,7 +110,6 @@ static struct korina_device korina_dev0_data = {
 static struct platform_device korina_dev0 = {
         .id = -1,
         .name = "korina",
-        .dev.driver_data = &korina_dev0_data,
         .resource = korina_dev0_res,
         .num_resources = ARRAY_SIZE(korina_dev0_res),
 };
@@ -332,6 +331,8 @@ static int __init plat_setup_devices(void)
         /* set the uart clock to the current cpu frequency */
         rb532_uart_res[0].uartclk = idt_cpu_freq;
 
+        dev_set_drvdata(&korina_dev0.dev, &korina_dev0_data);
+
         return platform_add_devices(rb532_devs, ARRAY_SIZE(rb532_devs));
 }