21 files changed, 99 insertions, 142 deletions

diff --git a/arch/sparc/include/asm/compat.h b/arch/sparc/include/asm/compat.h
index f260b58f5ce9..0e706257918f 100644
--- a/arch/sparc/include/asm/compat.h
+++ b/arch/sparc/include/asm/compat.h
@@ -240,4 +240,9 @@ struct compat_shmid64_ds {
         unsigned int    __unused2;
 };
 
+static inline int is_compat_task(void)
+{
+        return test_thread_flag(TIF_32BIT);
+}
+
 #endif /* _ASM_SPARC64_COMPAT_H */
diff --git a/arch/sparc/include/asm/seccomp.h b/arch/sparc/include/asm/seccomp.h
index 7fcd9968192b..adca1bce41d4 100644
--- a/arch/sparc/include/asm/seccomp.h
+++ b/arch/sparc/include/asm/seccomp.h
@@ -1,11 +1,5 @@
 #ifndef _ASM_SECCOMP_H
 
-#include <linux/thread_info.h> /* already defines TIF_32BIT */
-
-#ifndef TIF_32BIT
-#error "unexpected TIF_32BIT on sparc64"
-#endif
-
 #include <linux/unistd.h>
 
 #define __NR_seccomp_read __NR_read
diff --git a/arch/sparc/kernel/chmc.c b/arch/sparc/kernel/chmc.c
index 3b9f4d6e14a9..e1a9598e2a4d 100644
--- a/arch/sparc/kernel/chmc.c
+++ b/arch/sparc/kernel/chmc.c
@@ -306,6 +306,7 @@ static int jbusmc_print_dimm(int syndrome_code,
                 buf[1] = '?';
                 buf[2] = '?';
                 buf[3] = '\0';
+                return 0;
         }
         p = dp->controller;
         prop = &p->layout;
diff --git a/arch/sparc/kernel/head_64.S b/arch/sparc/kernel/head_64.S
index 8ffee714f932..a46c3a21e26d 100644
--- a/arch/sparc/kernel/head_64.S
+++ b/arch/sparc/kernel/head_64.S
@@ -891,10 +891,35 @@ prom_tba:	.xword	0
 tlb_type:       .word   0       /* Must NOT end up in BSS */
         .section        ".fixup",#alloc,#execinstr
 
-        .globl  __ret_efault, __retl_efault
-__ret_efault:
+        .globl  __ret_efault, __retl_efault, __ret_one, __retl_one
+ENTRY(__ret_efault)
         ret
          restore %g0, -EFAULT, %o0
-__retl_efault:
+ENDPROC(__ret_efault)
+
+ENTRY(__retl_efault)
         retl
          mov    -EFAULT, %o0
+ENDPROC(__retl_efault)
+
+ENTRY(__retl_one)
+        retl
+         mov    1, %o0
+ENDPROC(__retl_one)
+
+ENTRY(__ret_one_asi)
+        wr      %g0, ASI_AIUS, %asi
+        ret
+         restore %g0, 1, %o0
+ENDPROC(__ret_one_asi)
+
+ENTRY(__retl_one_asi)
+        wr      %g0, ASI_AIUS, %asi
+        retl
+         mov    1, %o0
+ENDPROC(__retl_one_asi)
+
+ENTRY(__retl_o1)
+        retl
+         mov    %o1, %o0
+ENDPROC(__retl_o1)
diff --git a/arch/sparc/kernel/irq_64.c b/arch/sparc/kernel/irq_64.c
index e289376198eb..1c378d8e90c5 100644
--- a/arch/sparc/kernel/irq_64.c
+++ b/arch/sparc/kernel/irq_64.c
@@ -323,17 +323,25 @@ static void sun4u_set_affinity(unsigned int virt_irq,
         sun4u_irq_enable(virt_irq);
 }
 
+/* Don't do anything.  The desc->status check for IRQ_DISABLED in
+ * handler_irq() will skip the handler call and that will leave the
+ * interrupt in the sent state.  The next ->enable() call will hit the
+ * ICLR register to reset the state machine.
+ *
+ * This scheme is necessary, instead of clearing the Valid bit in the
+ * IMAP register, to handle the case of IMAP registers being shared by
+ * multiple INOs (and thus ICLR registers).  Since we use a different
+ * virtual IRQ for each shared IMAP instance, the generic code thinks
+ * there is only one user so it prematurely calls ->disable() on
+ * free_irq().
+ *
+ * We have to provide an explicit ->disable() method instead of using
+ * NULL to get the default.  The reason is that if the generic code
+ * sees that, it also hooks up a default ->shutdown method which
+ * invokes ->mask() which we do not want.  See irq_chip_set_defaults().
+ */
 static void sun4u_irq_disable(unsigned int virt_irq)
 {
-        struct irq_handler_data *data = get_irq_chip_data(virt_irq);
-
-        if (likely(data)) {
-                unsigned long imap = data->imap;
-                unsigned long tmp = upa_readq(imap);
-
-                tmp &= ~IMAP_VALID;
-                upa_writeq(tmp, imap);
-        }
 }
 
 static void sun4u_irq_eoi(unsigned int virt_irq)
@@ -746,7 +754,8 @@ void handler_irq(int irq, struct pt_regs *regs)
 
                 desc = irq_desc + virt_irq;
 
-                desc->handle_irq(virt_irq, desc);
+                if (!(desc->status & IRQ_DISABLED))
+                        desc->handle_irq(virt_irq, desc);
 
                 bucket_pa = next_pa;
         }
diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c
index 09f088ed4a64..f3577223c863 100644
--- a/arch/sparc/kernel/nmi.c
+++ b/arch/sparc/kernel/nmi.c
@@ -70,6 +70,7 @@ static void die_nmi(const char *str, struct pt_regs *regs, int do_panic)
         printk(" on CPU%d, ip %08lx, registers:\n",
                smp_processor_id(), regs->tpc);
         show_regs(regs);
+        dump_stack();
 
         bust_spinlocks(0);
 
diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c
index 92e0dda141a4..1ae8cdd7e703 100644
--- a/arch/sparc/kernel/pcr.c
+++ b/arch/sparc/kernel/pcr.c
@@ -133,11 +133,16 @@ int __init pcr_arch_init(void)
 
         case cheetah:
         case cheetah_plus:
-        case spitfire:
                 pcr_ops = &direct_pcr_ops;
                 pcr_enable = PCR_SUN4U_ENABLE;
                 break;
 
+        case spitfire:
+                /* UltraSPARC-I/II and derivatives lack a profile
+                 * counter overflow interrupt so we can't make use of
+                 * their hardware currently.
+                 */
+                /* fallthrough */
         default:
                 err = -ENODEV;
                 goto out_unregister;
diff --git a/arch/sparc/lib/GENbzero.S b/arch/sparc/lib/GENbzero.S
index 6a4f956a2f7a..8e7a843ddd88 100644
--- a/arch/sparc/lib/GENbzero.S
+++ b/arch/sparc/lib/GENbzero.S
@@ -6,13 +6,9 @@
 
 #define EX_ST(x,y)              \
 98:     x,y;                    \
-        .section .fixup;        \
-        .align 4;               \
-99:     retl;                   \
-         mov    %o1, %o0;       \
         .section __ex_table,"a";\
         .align 4;               \
-        .word 98b, 99b;         \
+        .word 98b, __retl_o1;   \
         .text;                  \
         .align 4;
 
diff --git a/arch/sparc/lib/GENcopy_from_user.S b/arch/sparc/lib/GENcopy_from_user.S
index 2b9df99e87f9..b7d0bd6b1406 100644
--- a/arch/sparc/lib/GENcopy_from_user.S
+++ b/arch/sparc/lib/GENcopy_from_user.S
@@ -5,13 +5,9 @@
 
 #define EX_LD(x)                \
 98:     x;                      \
-        .section .fixup;        \
-        .align 4;               \
-99:     retl;                   \
-         mov    1, %o0;         \
         .section __ex_table,"a";\
         .align 4;               \
-        .word 98b, 99b;         \
+        .word 98b, __retl_one;  \
         .text;                  \
         .align 4;
 
@@ -27,7 +23,7 @@
 #define PREAMBLE                                        \
         rd              %asi, %g1;                      \
         cmp             %g1, ASI_AIUS;                  \
-        bne,pn          %icc, memcpy_user_stub;         \
+        bne,pn          %icc, ___copy_in_user;          \
          nop
 #endif
 
diff --git a/arch/sparc/lib/GENcopy_to_user.S b/arch/sparc/lib/GENcopy_to_user.S
index bb3f7084daf9..780550e1afc7 100644
--- a/arch/sparc/lib/GENcopy_to_user.S
+++ b/arch/sparc/lib/GENcopy_to_user.S
@@ -5,13 +5,9 @@
 
 #define EX_ST(x)                \
 98:     x;                      \
-        .section .fixup;        \
-        .align 4;               \
-99:     retl;                   \
-         mov    1, %o0;         \
         .section __ex_table,"a";\
         .align 4;               \
-        .word 98b, 99b;         \
+        .word 98b, __retl_one;  \
         .text;                  \
         .align 4;
 
@@ -31,7 +27,7 @@
 #define PREAMBLE                                        \
         rd              %asi, %g1;                      \
         cmp             %g1, ASI_AIUS;                  \
-        bne,pn          %icc, memcpy_user_stub;         \
+        bne,pn          %icc, ___copy_in_user;          \
          nop
 #endif
 
diff --git a/arch/sparc/lib/NG2copy_from_user.S b/arch/sparc/lib/NG2copy_from_user.S
index c77ef5f22102..119ccb9a54f4 100644
--- a/arch/sparc/lib/NG2copy_from_user.S
+++ b/arch/sparc/lib/NG2copy_from_user.S
@@ -5,14 +5,9 @@
 
 #define EX_LD(x)                \
 98:     x;                      \
-        .section .fixup;        \
-        .align 4;               \
-99:     wr      %g0, ASI_AIUS, %asi;\
-        retl;                   \
-         mov    1, %o0;         \
         .section __ex_table,"a";\
         .align 4;               \
-        .word 98b, 99b;         \
+        .word 98b, __retl_one_asi;\
         .text;                  \
         .align 4;
 
@@ -33,7 +28,7 @@
 #define PREAMBLE                                        \
         rd              %asi, %g1;                      \
         cmp             %g1, ASI_AIUS;                  \
-        bne,pn          %icc, memcpy_user_stub;         \
+        bne,pn          %icc, ___copy_in_user;          \
          nop
 #endif
 
diff --git a/arch/sparc/lib/NG2copy_to_user.S b/arch/sparc/lib/NG2copy_to_user.S
index 4bd4093acbbd..7fe1ccefd9d0 100644
--- a/arch/sparc/lib/NG2copy_to_user.S
+++ b/arch/sparc/lib/NG2copy_to_user.S
@@ -5,14 +5,9 @@
 
 #define EX_ST(x)                \
 98:     x;                      \
-        .section .fixup;        \
-        .align 4;               \
-99:     wr      %g0, ASI_AIUS, %asi;\
-        retl;                   \
-         mov    1, %o0;         \
         .section __ex_table,"a";\
         .align 4;               \
-        .word 98b, 99b;         \
+        .word 98b, __retl_one_asi;\
         .text;                  \
         .align 4;
 
@@ -42,7 +37,7 @@
 #define PREAMBLE                                        \
         rd              %asi, %g1;                      \
         cmp             %g1, ASI_AIUS;                  \
-        bne,pn          %icc, memcpy_user_stub;         \
+        bne,pn          %icc, ___copy_in_user;          \
          nop
 #endif
 
diff --git a/arch/sparc/lib/NGbzero.S b/arch/sparc/lib/NGbzero.S
index 814d5f7a45e1..beab29bf419b 100644
--- a/arch/sparc/lib/NGbzero.S
+++ b/arch/sparc/lib/NGbzero.S
@@ -6,13 +6,9 @@
 
 #define EX_ST(x,y)              \
 98:     x,y;                    \
-        .section .fixup;        \
-        .align 4;               \
-99:     retl;                   \
-         mov    %o1, %o0;       \
         .section __ex_table,"a";\
         .align 4;               \
-        .word 98b, 99b;         \
+        .word 98b, __retl_o1;   \
         .text;                  \
         .align 4;
 
diff --git a/arch/sparc/lib/NGcopy_from_user.S b/arch/sparc/lib/NGcopy_from_user.S
index e7f433f71b42..5d1e4d1ac21e 100644
--- a/arch/sparc/lib/NGcopy_from_user.S
+++ b/arch/sparc/lib/NGcopy_from_user.S
@@ -5,14 +5,9 @@
 
 #define EX_LD(x)                \
 98:     x;                      \
-        .section .fixup;        \
-        .align 4;               \
-99:     wr      %g0, ASI_AIUS, %asi;\
-        ret;                    \
-         restore %g0, 1, %o0;   \
         .section __ex_table,"a";\
         .align 4;               \
-        .word 98b, 99b;         \
+        .word 98b, __ret_one_asi;\
         .text;                  \
         .align 4;
 
@@ -30,7 +25,7 @@
 #define PREAMBLE                                        \
         rd              %asi, %g1;                      \
         cmp             %g1, ASI_AIUS;                  \
-        bne,pn          %icc, memcpy_user_stub;         \
+        bne,pn          %icc, ___copy_in_user;          \
          nop
 #endif
 
diff --git a/arch/sparc/lib/NGcopy_to_user.S b/arch/sparc/lib/NGcopy_to_user.S
index 6ea01c5532a0..ff630dcb273c 100644
--- a/arch/sparc/lib/NGcopy_to_user.S
+++ b/arch/sparc/lib/NGcopy_to_user.S
@@ -5,14 +5,9 @@
 
 #define EX_ST(x)                \
 98:     x;                      \
-        .section .fixup;        \
-        .align 4;               \
-99:     wr      %g0, ASI_AIUS, %asi;\
-        ret;                    \
-         restore %g0, 1, %o0;   \
         .section __ex_table,"a";\
         .align 4;               \
-        .word 98b, 99b;         \
+        .word 98b, __ret_one_asi;\
         .text;                  \
         .align 4;
 
@@ -33,7 +28,7 @@
 #define PREAMBLE                                        \
         rd              %asi, %g1;                      \
         cmp             %g1, ASI_AIUS;                  \
-        bne,pn          %icc, memcpy_user_stub;         \
+        bne,pn          %icc, ___copy_in_user;          \
          nop
 #endif
 
diff --git a/arch/sparc/lib/U1copy_from_user.S b/arch/sparc/lib/U1copy_from_user.S
index 3192b0bf4fab..a6ae2ea04bf5 100644
--- a/arch/sparc/lib/U1copy_from_user.S
+++ b/arch/sparc/lib/U1copy_from_user.S
@@ -5,13 +5,9 @@
 
 #define EX_LD(x)                \
 98:     x;                      \
-        .section .fixup;        \
-        .align 4;               \
-99:     retl;                   \
-         mov    1, %o0;         \
         .section __ex_table,"a";\
         .align 4;               \
-        .word 98b, 99b;         \
+        .word 98b, __retl_one;  \
         .text;                  \
         .align 4;
 
@@ -27,7 +23,7 @@
 #define PREAMBLE                                        \
         rd              %asi, %g1;                      \
         cmp             %g1, ASI_AIUS;                  \
-        bne,pn          %icc, memcpy_user_stub;         \
+        bne,pn          %icc, ___copy_in_user;          \
          nop;                                           \
 
 #include "U1memcpy.S"
diff --git a/arch/sparc/lib/U1copy_to_user.S b/arch/sparc/lib/U1copy_to_user.S
index d1210ffb0b82..f4b970eeb485 100644
--- a/arch/sparc/lib/U1copy_to_user.S
+++ b/arch/sparc/lib/U1copy_to_user.S
@@ -5,13 +5,9 @@
 
 #define EX_ST(x)                \
 98:     x;                      \
-        .section .fixup;        \
-        .align 4;               \
-99:     retl;                   \
-         mov    1, %o0;         \
         .section __ex_table,"a";\
         .align 4;               \
-        .word 98b, 99b;         \
+        .word 98b, __retl_one;  \
         .text;                  \
         .align 4;
 
@@ -27,7 +23,7 @@
 #define PREAMBLE                                        \
         rd              %asi, %g1;                      \
         cmp             %g1, ASI_AIUS;                  \
-        bne,pn          %icc, memcpy_user_stub;         \
+        bne,pn          %icc, ___copy_in_user;          \
          nop;                                           \
 
 #include "U1memcpy.S"
diff --git a/arch/sparc/lib/U3copy_from_user.S b/arch/sparc/lib/U3copy_from_user.S
index f5bfc8d9d216..b1acd1331c33 100644
--- a/arch/sparc/lib/U3copy_from_user.S
+++ b/arch/sparc/lib/U3copy_from_user.S
@@ -5,13 +5,9 @@
 
 #define EX_LD(x)                \
 98:     x;                      \
-        .section .fixup;        \
-        .align 4;               \
-99:     retl;                   \
-         mov    1, %o0;         \
         .section __ex_table,"a";\
         .align 4;               \
-        .word 98b, 99b;         \
+        .word 98b, __retl_one;  \
         .text;                  \
         .align 4;
 
diff --git a/arch/sparc/lib/U3copy_to_user.S b/arch/sparc/lib/U3copy_to_user.S
index 2334f111bb0c..ef1e493afdfa 100644
--- a/arch/sparc/lib/U3copy_to_user.S
+++ b/arch/sparc/lib/U3copy_to_user.S
@@ -5,13 +5,9 @@
 
 #define EX_ST(x)                \
 98:     x;                      \
-        .section .fixup;        \
-        .align 4;               \
-99:     retl;                   \
-         mov    1, %o0;         \
         .section __ex_table,"a";\
         .align 4;               \
-        .word 98b, 99b;         \
+        .word 98b, __retl_one;  \
         .text;                  \
         .align 4;
 
@@ -27,7 +23,7 @@
 #define PREAMBLE                                        \
         rd              %asi, %g1;                      \
         cmp             %g1, ASI_AIUS;                  \
-        bne,pn          %icc, memcpy_user_stub;         \
+        bne,pn          %icc, ___copy_in_user;          \
          nop;                                           \
 
 #include "U3memcpy.S"
diff --git a/arch/sparc/lib/bzero.S b/arch/sparc/lib/bzero.S
index c7bbae8c590f..b6557297440f 100644
--- a/arch/sparc/lib/bzero.S
+++ b/arch/sparc/lib/bzero.S
@@ -88,13 +88,9 @@ __bzero_done:
 
 #define EX_ST(x,y)              \
 98:     x,y;                    \
-        .section .fixup;        \
-        .align 4;               \
-99:     retl;                   \
-         mov    %o1, %o0;       \
         .section __ex_table,"a";\
         .align 4;               \
-        .word 98b, 99b;         \
+        .word 98b, __retl_o1;   \
         .text;                  \
         .align 4;
 
diff --git a/arch/sparc/lib/copy_in_user.S b/arch/sparc/lib/copy_in_user.S
index 650af3f21f78..302c0e60dc2c 100644
--- a/arch/sparc/lib/copy_in_user.S
+++ b/arch/sparc/lib/copy_in_user.S
@@ -3,19 +3,16 @@
  * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
  */
 
+#include <linux/linkage.h>
 #include <asm/asi.h>
 
 #define XCC xcc
 
 #define EX(x,y)                 \
 98:     x,y;                    \
-        .section .fixup;        \
-        .align 4;               \
-99:     retl;                   \
-         mov 1, %o0;            \
         .section __ex_table,"a";\
         .align 4;               \
-        .word 98b, 99b;         \
+        .word 98b, __retl_one;  \
         .text;                  \
         .align 4;
 
@@ -31,18 +28,7 @@
          * to copy register windows around during thread cloning.
          */
 
-        .globl          ___copy_in_user
-        .type           ___copy_in_user,#function
-___copy_in_user:        /* %o0=dst, %o1=src, %o2=len */
-        /* Writing to %asi is _expensive_ so we hardcode it.
-         * Reading %asi to check for KERNEL_DS is comparatively
-         * cheap.
-         */
-        rd              %asi, %g1
-        cmp             %g1, ASI_AIUS
-        bne,pn          %icc, memcpy_user_stub
-         nop
-
+ENTRY(___copy_in_user)  /* %o0=dst, %o1=src, %o2=len */
         cmp             %o2, 0
         be,pn           %XCC, 85f
          or             %o0, %o1, %o3
@@ -53,22 +39,24 @@ ___copy_in_user:	/* %o0=dst, %o1=src, %o2=len */
         /* 16 < len <= 64 */
         andcc           %o3, 0x7, %g0
         bne,pn          %XCC, 90f
-         sub            %o0, %o1, %o3
+         nop
 
         andn            %o2, 0x7, %o4
         and             %o2, 0x7, %o2
 1:      subcc           %o4, 0x8, %o4
         EX(ldxa [%o1] %asi, %o5)
-        EX(stxa %o5, [%o1 + %o3] ASI_AIUS)
+        EX(stxa %o5, [%o0] %asi)
+        add             %o1, 0x8, %o1
         bgu,pt          %XCC, 1b
-         add            %o1, 0x8, %o1
+         add            %o0, 0x8, %o0
         andcc           %o2, 0x4, %g0
         be,pt           %XCC, 1f
          nop
         sub             %o2, 0x4, %o2
         EX(lduwa [%o1] %asi, %o5)
-        EX(stwa %o5, [%o1 + %o3] ASI_AIUS)
+        EX(stwa %o5, [%o0] %asi)
         add             %o1, 0x4, %o1
+        add             %o0, 0x4, %o0
 1:      cmp             %o2, 0
         be,pt           %XCC, 85f
          nop
@@ -78,14 +66,15 @@ ___copy_in_user:	/* %o0=dst, %o1=src, %o2=len */
 80:     /* 0 < len <= 16 */
         andcc           %o3, 0x3, %g0
         bne,pn          %XCC, 90f
-         sub            %o0, %o1, %o3
+         nop
 
 82:
         subcc           %o2, 4, %o2
         EX(lduwa [%o1] %asi, %g1)
-        EX(stwa %g1, [%o1 + %o3] ASI_AIUS)
+        EX(stwa %g1, [%o0] %asi)
+        add             %o1, 4, %o1
         bgu,pt          %XCC, 82b
-         add            %o1, 4, %o1
+         add            %o0, 4, %o0
 
 85:     retl
          clr            %o0
@@ -94,26 +83,10 @@ ___copy_in_user:	/* %o0=dst, %o1=src, %o2=len */
 90:
         subcc           %o2, 1, %o2
         EX(lduba [%o1] %asi, %g1)
-        EX(stba %g1, [%o1 + %o3] ASI_AIUS)
+        EX(stba %g1, [%o0] %asi)
+        add             %o1, 1, %o1
         bgu,pt          %XCC, 90b
-         add            %o1, 1, %o1
+         add            %o0, 1, %o0
         retl
          clr            %o0
-
-        .size           ___copy_in_user, .-___copy_in_user
-
-        /* Act like copy_{to,in}_user(), ie. return zero instead
-         * of original destination pointer.  This is invoked when
-         * copy_{to,in}_user() finds that %asi is kernel space.
-         */
-        .globl          memcpy_user_stub
-        .type           memcpy_user_stub,#function
-memcpy_user_stub:
-        save            %sp, -192, %sp
-        mov             %i0, %o0
-        mov             %i1, %o1
-        call            memcpy
-         mov            %i2, %o2
-        ret
-         restore        %g0, %g0, %o0
-        .size           memcpy_user_stub, .-memcpy_user_stub
+ENDPROC(___copy_in_user)