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