[RFC patch 2/5] RISC-V: Reserve about 5K space in mcontext_t to support future ISA expansion.

[Vincent Chen]

Following the changes of struct sigcontext in Linux to reserve about 5K space
to support future ISA expansion.
---
 sysdeps/unix/sysv/linux/riscv/sys/ucontext.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sysdeps/unix/sysv/linux/riscv/sys/ucontext.h b/sysdeps/unix/sysv/linux/riscv/sys/ucontext.h
index cfafa44..80caf07 100644
--- a/sysdeps/unix/sysv/linux/riscv/sys/ucontext.h
+++ b/sysdeps/unix/sysv/linux/riscv/sys/ucontext.h
@@ -82,6 +82,8 @@ typedef struct mcontext_t
   {
     __riscv_mc_gp_state __gregs;
     union  __riscv_mc_fp_state __fpregs;
+    /* 5K + 256 reserved for vector state and future expansion.  */
+    unsigned char __reserved[5376] __attribute__ ((__aligned__ (16)));
   } mcontext_t;
 
 /* Userlevel context.  */
-- 
2.7.4