From d68dbb0c9ac8b1ff52eb09aa58ce6358400fa939 Mon Sep 17 00:00:00 2001 From: Christian Brauner Date: Fri, 21 Jun 2019 01:26:35 +0200 Subject: arch: handle arches who do not yet define clone3 This cleanly handles arches who do not yet define clone3. clone3() was initially placed under __ARCH_WANT_SYS_CLONE under the assumption that this would cleanly handle all architectures. It does not. Architectures such as nios2 or h8300 simply take the asm-generic syscall definitions and generate their syscall table from it. Since they don't define __ARCH_WANT_SYS_CLONE the build would fail complaining about sys_clone3 missing. The reason this doesn't happen for legacy clone is that nios2 and h8300 provide assembly stubs for sys_clone. This seems to be done for architectural reasons. The build failures for nios2 and h8300 were caught int -next luckily. The solution is to define __ARCH_WANT_SYS_CLONE3 that architectures can add. Additionally, we need a cond_syscall(clone3) for architectures such as nios2 or h8300 that generate their syscall table in the way I explained above. Fixes: 8f3220a80654 ("arch: wire-up clone3() syscall") Signed-off-by: Christian Brauner Cc: Arnd Bergmann Cc: Kees Cook Cc: David Howells Cc: Andrew Morton Cc: Oleg Nesterov Cc: Adrian Reber Cc: Linus Torvalds Cc: Al Viro Cc: Florian Weimer Cc: linux-api@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: x86@kernel.org --- arch/xtensa/include/asm/unistd.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/xtensa/include') diff --git a/arch/xtensa/include/asm/unistd.h b/arch/xtensa/include/asm/unistd.h index 30af4dc3ce7b..b52236245e51 100644 --- a/arch/xtensa/include/asm/unistd.h +++ b/arch/xtensa/include/asm/unistd.h @@ -3,6 +3,7 @@ #define _XTENSA_UNISTD_H #define __ARCH_WANT_SYS_CLONE +#define __ARCH_WANT_SYS_CLONE3 #include #define __ARCH_WANT_NEW_STAT -- cgit v1.2.3