diff options
Diffstat (limited to 'arch/mips/kernel/syscall.c')
| -rw-r--r-- | arch/mips/kernel/syscall.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c index af1bdc897488..343015a2f418 100644 --- a/arch/mips/kernel/syscall.c +++ b/arch/mips/kernel/syscall.c @@ -40,12 +40,19 @@ #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; - error = do_pipe(fd); + error = do_pipe_flags(fd, 0); if (error) { res = error; goto out; |