Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  math-emu: Fix thinko in _FP_DIV
  math-emu: Fix signalling of underflow and inexact while packing result.
  sparc: Add checkstack support
  sparc: correct section of current_pc()
  sparc: correct section of apc_no_idle
  sparc64: Fix race in arch/sparc64/kernel/trampoline.S

5 files changed, 35 insertions, 9 deletions

diff --git a/arch/sparc/kernel/apc.c b/arch/sparc/kernel/apc.c
index 4dd1ba752ce6..9c115823c4b5 100644
--- a/arch/sparc/kernel/apc.c
+++ b/arch/sparc/kernel/apc.c
@@ -31,7 +31,7 @@
 #define APC_DEVNAME "apc"
 
 static u8 __iomem *regs;
-static int apc_no_idle __initdata = 0;
+static int apc_no_idle __devinitdata = 0;
 
 #define apc_readb(offs)         (sbus_readb(regs+offs))
 #define apc_writeb(val, offs)   (sbus_writeb(val, regs+offs))
diff --git a/arch/sparc/kernel/head.S b/arch/sparc/kernel/head.S
index 2d325fd84579..2fe2c117e772 100644
--- a/arch/sparc/kernel/head.S
+++ b/arch/sparc/kernel/head.S
@@ -465,6 +465,7 @@ gokernel:
                 mov     %o7, %g4                ! Save %o7
 
                 /* Jump to it, and pray... */
+                __INIT
 current_pc:
                 call    1f
                  nop
diff --git a/arch/sparc64/kernel/trampoline.S b/arch/sparc64/kernel/trampoline.S
index 704a3afcfd06..83abd5ae88a4 100644
--- a/arch/sparc64/kernel/trampoline.S
+++ b/arch/sparc64/kernel/trampoline.S
@@ -328,6 +328,12 @@ after_lock_tlb:
 
         wrpr            %g0, 0, %wstate
 
+        sethi           %hi(prom_entry_lock), %g2
+1:      ldstub          [%g2 + %lo(prom_entry_lock)], %g1
+        membar          #StoreLoad | #StoreStore
+        brnz,pn         %g1, 1b
+         nop
+
         /* As a hack, put &init_thread_union into %g6.
          * prom_world() loads from here to restore the %asi
          * register.
@@ -337,7 +343,7 @@ after_lock_tlb:
 
         sethi           %hi(is_sun4v), %o0
         lduw            [%o0 + %lo(is_sun4v)], %o0
-        brz,pt          %o0, 1f
+        brz,pt          %o0, 2f
          nop
 
         TRAP_LOAD_TRAP_BLOCK(%g2, %g3)
@@ -369,10 +375,10 @@ after_lock_tlb:
         call            %o1
          add            %sp, (2047 + 128), %o0
 
-        ba,pt           %xcc, 2f
+        ba,pt           %xcc, 3f
          nop
 
-1:      sethi           %hi(sparc64_ttable_tl0), %o0
+2:      sethi           %hi(sparc64_ttable_tl0), %o0
         set             prom_set_trap_table_name, %g2
         stx             %g2, [%sp + 2047 + 128 + 0x00]
         mov             1, %g2
@@ -386,7 +392,11 @@ after_lock_tlb:
         call            %o1
          add            %sp, (2047 + 128), %o0
 
-2:      ldx             [%l0], %g6
+3:      sethi           %hi(prom_entry_lock), %g2
+        stb             %g0, [%g2 + %lo(prom_entry_lock)]
+        membar          #StoreStore | #StoreLoad
+
+        ldx             [%l0], %g6
         ldx             [%g6 + TI_TASK], %g4
 
         mov             1, %g5
diff --git a/include/math-emu/op-common.h b/include/math-emu/op-common.h
index cc1ec396f8d6..f456534dcaf9 100644
--- a/include/math-emu/op-common.h
+++ b/include/math-emu/op-common.h
@@ -139,18 +139,27 @@ do {								\
         if (X##_e <= _FP_WFRACBITS_##fs)                        \
           {                                                     \
             _FP_FRAC_SRS_##wc(X, X##_e, _FP_WFRACBITS_##fs);    \
-            _FP_ROUND(wc, X);                                   \
             if (_FP_FRAC_HIGH_##fs(X)                           \
                 & (_FP_OVERFLOW_##fs >> 1))                     \
               {                                                 \
                 X##_e = 1;                                      \
                 _FP_FRAC_SET_##wc(X, _FP_ZEROFRAC_##wc);        \
-                FP_SET_EXCEPTION(FP_EX_INEXACT);                \
               }                                                 \
             else                                                \
               {                                                 \
-                X##_e = 0;                                      \
-                _FP_FRAC_SRL_##wc(X, _FP_WORKBITS);             \
+                _FP_ROUND(wc, X);                               \
+                if (_FP_FRAC_HIGH_##fs(X)                       \
+                   & (_FP_OVERFLOW_##fs >> 1))                  \
+                  {                                             \
+                    X##_e = 1;                                  \
+                    _FP_FRAC_SET_##wc(X, _FP_ZEROFRAC_##wc);    \
+                    FP_SET_EXCEPTION(FP_EX_INEXACT);            \
+                  }                                             \
+                else                                            \
+                  {                                             \
+                    X##_e = 0;                                  \
+                    _FP_FRAC_SRL_##wc(X, _FP_WORKBITS);         \
+                  }                                             \
               }                                                 \
             if ((FP_CUR_EXCEPTIONS & FP_EX_INEXACT) ||          \
                 (FP_TRAPPING_EXCEPTIONS & FP_EX_UNDERFLOW))     \
@@ -494,6 +503,8 @@ do {							\
     R##_c = FP_CLS_NAN;                                 \
     _FP_FRAC_SET_##wc(R, _FP_NANFRAC_##fs);             \
     FP_SET_EXCEPTION(FP_EX_INVALID | FP_EX_INVALID_IDI);\
+    break;                                              \
+                                                        \
   case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_ZERO):        \
     R##_s = _FP_NANSIGN_##fs;                           \
     R##_c = FP_CLS_NAN;                                 \
diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index f7e8e93ff30d..14ee68e991dd 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -14,6 +14,7 @@
 #       M68k port by Geert Uytterhoeven and Andreas Schwab
 #       AVR32 port by Haavard Skinnemoen <hskinnemoen@atmel.com>
 #       PARISC port by Kyle McMartin <kyle@parisc-linux.org>
+#       sparc port by Martin Habets <errandir_news@mph.eclipse.co.uk>
 #
 #       Usage:
 #       objdump -d vmlinux | scripts/checkstack.pl [arch]
@@ -94,6 +95,9 @@ my (@stack, $re, $dre, $x, $xs);
         } elsif ($arch =~ /^blackfin$/) {
                 #   0:   00 e8 38 01     LINK 0x4e0;
                 $re = qr/.*[[:space:]]LINK[[:space:]]*(0x$x{1,8})/o;
+        } elsif ($arch eq 'sparc' || $arch eq 'sparc64') {
+                # f0019d10:       9d e3 bf 90     save  %sp, -112, %sp
+                $re = qr/.*save.*%sp, -(([0-9]{2}|[3-9])[0-9]{2}), %sp/o;
         } else {
                 print("wrong or unknown architecture \"$arch\"\n");
                 exit