[PATCH 02/13] Use sys_ni.c instead of #ifdef to disable fork on CONFIG_NOMMU

From: Palmer Dabbelt
Date: Tue Nov 03 2015 - 14:48:44 EST

I think this change actually doesn't do anything: __NR_fork was still
being defined either way, and on my machine fork() in <unistd.h> comes
from libc.

This just moves to the standard mechanism for defining syscalls that
aren't implemented instead, which has the side-effect of no longer
having an #ifdef CONFIG_* in a user-visible header.

Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxx>
Reviewed-by: Andrew Waterman <waterman@xxxxxxxxxxxxxxxxx>
Reviewed-by: Albert Ou <aou@xxxxxxxxxxxxxxxxx>
include/uapi/asm-generic/unistd.h | 4 ----
kernel/sys_ni.c | 1 +
2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index ee12400..ffd2957 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -869,11 +869,7 @@ __SYSCALL(__NR_uselib, sys_uselib)
__SYSCALL(__NR__sysctl, sys_sysctl)

#define __NR_fork 1079
-#ifdef CONFIG_MMU
__SYSCALL(__NR_fork, sys_fork)
-__SYSCALL(__NR_fork, sys_ni_syscall)
-#endif /* CONFIG_MMU */

#undef __NR_syscalls
#define __NR_syscalls (__NR_fork+1)
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index a02decf..c830f7f 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -174,6 +174,7 @@ cond_syscall(sys_setfsuid);

/* arch-specific weak syscall entries */

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/