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, 45 insertions, 0 deletions

diff --git a/arch/mips/lib/strnlen_user.S b/arch/mips/lib/strnlen_user.S
new file mode 100644
index 000000000000..6e7a8eed4de8
--- /dev/null
+++ b/arch/mips/lib/strnlen_user.S
@@ -0,0 +1,45 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 1996, 1998, 1999, 2004 by Ralf Baechle
+ * Copyright (c) 1999 Silicon Graphics, Inc.
+ */
+#include <asm/asm.h>
+#include <asm/offset.h>
+#include <asm/regdef.h>
+
+#define EX(insn,reg,addr,handler)                       \
+9:      insn    reg, addr;                              \
+        .section __ex_table,"a";                        \
+        PTR     9b, handler;                            \
+        .previous
+
+/*
+ * Return the size of a string including the ending NUL character upto a
+ * maximum of a1 or 0 in case of error.
+ *
+ * Note: for performance reasons we deliberately accept that a user may
+ *       make strlen_user and strnlen_user access the first few KSEG0
+ *       bytes.  There's nothing secret there.  On 64-bit accessing beyond
+ *       the maximum is a tad hairier ...
+ */
+LEAF(__strnlen_user_asm)
+        LONG_L          v0, TI_ADDR_LIMIT($28)  # pointer ok?
+        and             v0, a0
+        bnez            v0, fault
+
+FEXPORT(__strnlen_user_nocheck_asm)
+        move            v0, a0
+        PTR_ADDU        a1, a0                  # stop pointer
+1:      beq             v0, a1, 1f              # limit reached?
+        EX(lb, t0, (v0), fault)
+        PTR_ADDU        v0, 1
+        bnez            t0, 1b
+1:      PTR_SUBU        v0, a0
+        jr              ra
+        END(__strnlen_user_asm)
+
+fault:  move            v0, zero
+        jr              ra