arm64: fix padding computation in struct ucontext

The expression to compute the padding needed to fill the uc_sigmask field
to 1024 bits actually computes the padding needed for 1080 bits.
Fortunately, due to the 16-byte alignment of the following field
(uc_mcontext) the definition in glibc contains enough bytes of padding
after uc_sigmask so that the overall offsets and size match in both
definitions.

Signed-off-by: Andreas Schwab <schwab@suse.de>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/arm64/include/asm/ucontext.h b/arch/arm64/include/asm/ucontext.h
index bde960720892..42e04c877428 100644
--- a/arch/arm64/include/asm/ucontext.h
+++ b/arch/arm64/include/asm/ucontext.h
@@ -22,7 +22,7 @@ struct ucontext {
         stack_t           uc_stack;
         sigset_t          uc_sigmask;
         /* glibc uses a 1024-bit sigset_t */
-        __u8              __unused[(1024 - sizeof(sigset_t)) / 8];
+        __u8              __unused[1024 / 8 - sizeof(sigset_t)];
         /* last for future expansion */
         struct sigcontext uc_mcontext;
 };