[PATCH 4.9 215/223] arm64: compat: Provide definition for COMPAT_SIGMINSTKSZ

From: Greg Kroah-Hartman
Date: Fri Aug 02 2019 - 05:53:35 EST

From: Will Deacon <will.deacon@xxxxxxx>

commit 24951465cbd279f60b1fdc2421b3694405bcff42 upstream.

arch/arm/ defines a SIGMINSTKSZ of 2k, so we should use the same value
for compat tasks.

Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Dominik Brodowski <linux@xxxxxxxxxxxxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Reviewed-by: Dave Martin <Dave.Martin@xxxxxxx>
Reported-by: Steve McIntyre <steve.mcintyre@xxxxxxx>
Tested-by: Steve McIntyre <93sam@xxxxxxxxxx>
Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

arch/arm64/include/asm/compat.h | 1 +
1 file changed, 1 insertion(+)

--- a/arch/arm64/include/asm/compat.h
+++ b/arch/arm64/include/asm/compat.h
@@ -234,6 +234,7 @@ static inline compat_uptr_t ptr_to_compa

#define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))

static inline void __user *arch_compat_alloc_user_space(long len)