From e0fd18ce1169595df929373cad2ae9b00b2289c2 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 18 Oct 2012 00:55:54 -0400 Subject: arm64: get rid of fork/vfork/clone wrappers [fixes from Catalin Marinas folded] Acked-by: Catalin Marinas Tested-by: Catalin Marinas Signed-off-by: Al Viro --- arch/arm64/kernel/process.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'arch/arm64/kernel/process.c') diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index bf615e212c6c..f82987a784af 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -246,14 +246,20 @@ int copy_thread(unsigned long clone_flags, unsigned long stack_start, *childregs = *regs; childregs->regs[0] = 0; if (is_compat_thread(task_thread_info(p))) { - childregs->compat_sp = stack_start; + if (stack_start) + childregs->compat_sp = stack_start; } else { /* * Read the current TLS pointer from tpidr_el0 as it may be * out-of-sync with the saved value. */ asm("mrs %0, tpidr_el0" : "=r" (tls)); - childregs->sp = stack_start; + if (stack_start) { + /* 16-byte aligned stack mandatory on AArch64 */ + if (stack_start & 15) + return -EINVAL; + childregs->sp = stack_start; + } } /* * If a TLS pointer was passed to clone (4th argument), use it -- cgit