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authorRalf Baechle <ralf@linux-mips.org>2008-07-20 13:16:46 +0100
committerRalf Baechle <ralf@linux-mips.org>2008-07-20 14:38:21 +0100
commit8213bbf9c1c0009872a3278aa7a83ec8f3508195 (patch)
tree1fd6d8e006f2ddd9bcc7396eab092a12dc16eace /arch
parent4914ad4a9f2d484a68422700ba8493db73c7c411 (diff)
[MIPS] Rename MIPS sys_pipe syscall entry point to something MIPS-specific.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/kernel/scall32-o32.S2
-rw-r--r--arch/mips/kernel/scall64-64.S2
-rw-r--r--arch/mips/kernel/scall64-n32.S2
-rw-r--r--arch/mips/kernel/scall64-o32.S2
-rw-r--r--arch/mips/kernel/syscall.c9
5 files changed, 12 insertions, 5 deletions
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;