[MIPS] Rename MIPS sys_pipe syscall entry point to something MIPS-specific.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index c058c0b..fc4fd4d 100644 (file)
--- 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 dc597b6..2b73fd1 100644 (file)
--- 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 12940ec..2654e75 100644 (file)
--- 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 9a275ef..76167be 100644 (file)
--- 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 af1bdc8..3523c8d 100644 (file)
--- 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;