Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 165 insertions, 0 deletions

diff --git a/arch/sparc64/lib/rwsem.S b/arch/sparc64/lib/rwsem.S
new file mode 100644
index 000000000000..174ff7b9164c
--- /dev/null
+++ b/arch/sparc64/lib/rwsem.S
@@ -0,0 +1,165 @@
+/* rwsem.S: RW semaphore assembler.
+ *
+ * Written by David S. Miller (davem@redhat.com), 2001.
+ * Derived from asm-i386/rwsem.h
+ */
+
+#include <asm/rwsem-const.h>
+
+        .section        .sched.text
+
+        .globl          __down_read
+__down_read:
+1:      lduw            [%o0], %g1
+        add             %g1, 1, %g7
+        cas             [%o0], %g1, %g7
+        cmp             %g1, %g7
+        bne,pn          %icc, 1b
+         add            %g7, 1, %g7
+        cmp             %g7, 0
+        bl,pn           %icc, 3f
+         membar         #StoreLoad | #StoreStore
+2:
+        retl
+         nop
+3:
+        save            %sp, -192, %sp
+        call            rwsem_down_read_failed
+         mov            %i0, %o0
+        ret
+         restore
+        .size           __down_read, .-__down_read
+
+        .globl          __down_read_trylock
+__down_read_trylock:
+1:      lduw            [%o0], %g1
+        add             %g1, 1, %g7
+        cmp             %g7, 0
+        bl,pn           %icc, 2f
+         mov            0, %o1
+        cas             [%o0], %g1, %g7
+        cmp             %g1, %g7
+        bne,pn          %icc, 1b
+         mov            1, %o1
+        membar          #StoreLoad | #StoreStore
+2:      retl
+         mov            %o1, %o0
+        .size           __down_read_trylock, .-__down_read_trylock
+
+        .globl          __down_write
+__down_write:
+        sethi           %hi(RWSEM_ACTIVE_WRITE_BIAS), %g1
+        or              %g1, %lo(RWSEM_ACTIVE_WRITE_BIAS), %g1
+1:
+        lduw            [%o0], %g3
+        add             %g3, %g1, %g7
+        cas             [%o0], %g3, %g7
+        cmp             %g3, %g7
+        bne,pn          %icc, 1b
+         cmp            %g7, 0
+        bne,pn          %icc, 3f
+         membar         #StoreLoad | #StoreStore
+2:      retl
+         nop
+3:
+        save            %sp, -192, %sp
+        call            rwsem_down_write_failed
+         mov            %i0, %o0
+        ret
+         restore
+        .size           __down_write, .-__down_write
+
+        .globl          __down_write_trylock
+__down_write_trylock:
+        sethi           %hi(RWSEM_ACTIVE_WRITE_BIAS), %g1
+        or              %g1, %lo(RWSEM_ACTIVE_WRITE_BIAS), %g1
+1:
+        lduw            [%o0], %g3
+        cmp             %g3, 0
+        bne,pn          %icc, 2f
+         mov            0, %o1
+        add             %g3, %g1, %g7
+        cas             [%o0], %g3, %g7
+        cmp             %g3, %g7
+        bne,pn          %icc, 1b
+         mov            1, %o1
+        membar          #StoreLoad | #StoreStore
+2:      retl
+         mov            %o1, %o0
+        .size           __down_write_trylock, .-__down_write_trylock
+
+        .globl          __up_read
+__up_read:
+1:
+        lduw            [%o0], %g1
+        sub             %g1, 1, %g7
+        cas             [%o0], %g1, %g7
+        cmp             %g1, %g7
+        bne,pn          %icc, 1b
+         cmp            %g7, 0
+        bl,pn           %icc, 3f
+         membar         #StoreLoad | #StoreStore
+2:      retl
+         nop
+3:      sethi           %hi(RWSEM_ACTIVE_MASK), %g1
+        sub             %g7, 1, %g7
+        or              %g1, %lo(RWSEM_ACTIVE_MASK), %g1
+        andcc           %g7, %g1, %g0
+        bne,pn          %icc, 2b
+         nop
+        save            %sp, -192, %sp
+        call            rwsem_wake
+         mov            %i0, %o0
+        ret
+         restore
+        .size           __up_read, .-__up_read
+
+        .globl          __up_write
+__up_write:
+        sethi           %hi(RWSEM_ACTIVE_WRITE_BIAS), %g1
+        or              %g1, %lo(RWSEM_ACTIVE_WRITE_BIAS), %g1
+1:
+        lduw            [%o0], %g3
+        sub             %g3, %g1, %g7
+        cas             [%o0], %g3, %g7
+        cmp             %g3, %g7
+        bne,pn          %icc, 1b
+         sub            %g7, %g1, %g7
+        cmp             %g7, 0
+        bl,pn           %icc, 3f
+         membar         #StoreLoad | #StoreStore
+2:
+        retl
+         nop
+3:
+        save            %sp, -192, %sp
+        call            rwsem_wake
+         mov            %i0, %o0
+        ret
+         restore
+        .size           __up_write, .-__up_write
+
+        .globl          __downgrade_write
+__downgrade_write:
+        sethi           %hi(RWSEM_WAITING_BIAS), %g1
+        or              %g1, %lo(RWSEM_WAITING_BIAS), %g1
+1:
+        lduw            [%o0], %g3
+        sub             %g3, %g1, %g7
+        cas             [%o0], %g3, %g7
+        cmp             %g3, %g7
+        bne,pn          %icc, 1b
+         sub            %g7, %g1, %g7
+        cmp             %g7, 0
+        bl,pn           %icc, 3f
+         membar         #StoreLoad | #StoreStore
+2:
+        retl
+         nop
+3:
+        save            %sp, -192, %sp
+        call            rwsem_downgrade_wake
+         mov            %i0, %o0
+        ret
+         restore
+        .size           __downgrade_write, .-__downgrade_write