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Commit 5ad0d383 authored by Roland McGrath's avatar Roland McGrath Committed by Linus Torvalds
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[PATCH] x86_64: fix put_user for 64-bit constant 



On x86-64, a put_user call using a 64-bit pointer and a constant value that
is > 0xffffffff will produce code that doesn't assemble.  This patch fixes
the asm construct to use the Z constraint for 32-bit constants.

Signed-off-by: default avatarRoland McGrath <roland@redhat.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 99abfeaf

include/asm-x86_64/uaccess.h

+1 −1
Original line number Diff line number Diff line
@@ -157,7 +157,7 @@ do { \ 
	  case 1: __put_user_asm(x,ptr,retval,"b","b","iq",-EFAULT); break;\

	  case 2: __put_user_asm(x,ptr,retval,"w","w","ir",-EFAULT); break;\

	  case 4: __put_user_asm(x,ptr,retval,"l","k","ir",-EFAULT); break;\

	  case 8: __put_user_asm(x,ptr,retval,"q","","ir",-EFAULT); break;\

	  case 8: __put_user_asm(x,ptr,retval,"q","","Zr",-EFAULT); break;\

	  default: __put_user_bad();					\

	}								\

} while (0)