diff options
Diffstat (limited to 'arch/mips/kernel/syscall.c')
| -rw-r--r-- | arch/mips/kernel/syscall.c | 9 |
1 files changed, 8 insertions, 1 deletions
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; |