Merge branch 'linus' into xen-64bit

6 files changed, 12 insertions, 22 deletions

diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 65af3cc90ab..c266211ed65 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -129,23 +129,6 @@ out:
 	return error;
 }
 
-
-asmlinkage int sys_truncate64(const char __user *path, unsigned int high,
-			      unsigned int low)
-{
-	if ((int)high < 0)
-		return -EINVAL;
-	return sys_truncate(path, ((long) high << 32) | low);
-}
-
-asmlinkage int sys_ftruncate64(unsigned int fd, unsigned int high,
-			       unsigned int low)
-{
-	if ((int)high < 0)
-		return -EINVAL;
-	return sys_ftruncate(fd, ((long) high << 32) | low);
-}
-
 /*
  * sys_execve() executes a new program.
  */
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index c058c0b61a2..fc4fd4d705e 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -354,7 +354,7 @@ einval:	li	v0, -EINVAL
 	sys	sys_mkdir		2
 	sys	sys_rmdir		1	/* 4040 */
 	sys	sys_dup			1
-	sys	sys_pipe		0
+	sys	sysm_pipe		0
 	sys	sys_times		1
 	sys	sys_ni_syscall		0
 	sys	sys_brk			1	/* 4045 */
diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S
index dc597b600c6..2b73fd1e452 100644
--- a/arch/mips/kernel/scall64-64.S
+++ b/arch/mips/kernel/scall64-64.S
@@ -219,7 +219,7 @@ sys_call_table:
 	PTR	sys_readv
 	PTR	sys_writev
 	PTR	sys_access			/* 5020 */
-	PTR	sys_pipe
+	PTR	sysm_pipe
 	PTR	sys_select
 	PTR	sys_sched_yield
 	PTR	sys_mremap
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index 12940eca789..2654e75d2fe 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -141,7 +141,7 @@ EXPORT(sysn32_call_table)
 	PTR	compat_sys_readv
 	PTR	compat_sys_writev
 	PTR	sys_access			/* 6020 */
-	PTR	sys_pipe
+	PTR	sysm_pipe
 	PTR	compat_sys_select
 	PTR	sys_sched_yield
 	PTR	sys_mremap
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 9a275efb4f0..76167bea5a7 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -247,7 +247,7 @@ sys_call_table:
 	PTR	sys_mkdir
 	PTR	sys_rmdir			/* 4040 */
 	PTR	sys_dup
-	PTR	sys_pipe
+	PTR	sysm_pipe
 	PTR	compat_sys_times
 	PTR	sys_ni_syscall
 	PTR	sys_brk				/* 4045 */
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index af1bdc89748..3523c8d12ed 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -40,7 +40,14 @@
 #include <asm/sysmips.h>
 #include <asm/uaccess.h>
 
-asmlinkage int sys_pipe(nabi_no_regargs volatile struct pt_regs regs)
+/*
+ * For historic reasons the pipe(2) syscall on MIPS has an unusual calling
+ * convention.  It returns results in registers $v0 / $v1 which means there
+ * is no need for it to do verify the validity of a userspace pointer
+ * argument.  Historically that used to be expensive in Linux.  These days
+ * the performance advantage is negligible.
+ */
+asmlinkage int sysm_pipe(nabi_no_regargs volatile struct pt_regs regs)
 {
 	int fd[2];
 	int error, res;