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, 72 insertions, 0 deletions

diff --git a/arch/sparc/lib/locks.S b/arch/sparc/lib/locks.S
new file mode 100644
index 000000000000..95fa48424967
--- /dev/null
+++ b/arch/sparc/lib/locks.S
@@ -0,0 +1,72 @@
+/* $Id: locks.S,v 1.16 2000/02/26 11:02:47 anton Exp $
+ * locks.S: SMP low-level lock primitives on Sparc.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1998 Anton Blanchard (anton@progsoc.uts.edu.au)
+ * Copyright (C) 1998 Jakub Jelinek   (jj@ultra.linux.cz)
+ */
+
+#include <asm/ptrace.h>
+#include <asm/psr.h>
+#include <asm/smp.h>
+#include <asm/spinlock.h>
+
+        .text
+        .align  4
+
+        /* Read/writer locks, as usual this is overly clever to make it
+         * as fast as possible.
+         */
+
+        /* caches... */
+___rw_read_enter_spin_on_wlock:
+        orcc    %g2, 0x0, %g0
+        be,a    ___rw_read_enter
+         ldstub [%g1 + 3], %g2
+        b       ___rw_read_enter_spin_on_wlock
+         ldub   [%g1 + 3], %g2
+___rw_read_exit_spin_on_wlock:
+        orcc    %g2, 0x0, %g0
+        be,a    ___rw_read_exit
+         ldstub [%g1 + 3], %g2
+        b       ___rw_read_exit_spin_on_wlock
+         ldub   [%g1 + 3], %g2
+___rw_write_enter_spin_on_wlock:
+        orcc    %g2, 0x0, %g0
+        be,a    ___rw_write_enter
+         ldstub [%g1 + 3], %g2
+        b       ___rw_write_enter_spin_on_wlock
+         ld     [%g1], %g2
+
+        .globl  ___rw_read_enter
+___rw_read_enter:
+        orcc    %g2, 0x0, %g0
+        bne,a   ___rw_read_enter_spin_on_wlock
+         ldub   [%g1 + 3], %g2
+        ld      [%g1], %g2
+        add     %g2, 1, %g2
+        st      %g2, [%g1]
+        retl
+         mov    %g4, %o7
+
+        .globl  ___rw_read_exit
+___rw_read_exit:
+        orcc    %g2, 0x0, %g0
+        bne,a   ___rw_read_exit_spin_on_wlock
+         ldub   [%g1 + 3], %g2
+        ld      [%g1], %g2
+        sub     %g2, 0x1ff, %g2
+        st      %g2, [%g1]
+        retl
+         mov    %g4, %o7
+
+        .globl  ___rw_write_enter
+___rw_write_enter:
+        orcc    %g2, 0x0, %g0
+        bne     ___rw_write_enter_spin_on_wlock
+         ld     [%g1], %g2
+        andncc  %g2, 0xff, %g0
+        bne,a   ___rw_write_enter_spin_on_wlock
+         stb    %g0, [%g1 + 3]
+        retl
+         mov    %g4, %o7