[PATCH] i386: let signal handlers set the resume flag

Allow signal handlers to set the RF bit in EFLAGS.  This lets a simple
debugger using SIGTRAP skip one instruction after returning from a signal.

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/i386/kernel/signal.c

@@ -123,7 +123,8 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *peax
 	  err |= __get_user(tmp, &sc->seg);				\
 	  loadsegment(seg,tmp); }
 
-#define	FIX_EFLAGS	(X86_EFLAGS_AC | X86_EFLAGS_OF | X86_EFLAGS_DF | \
+#define	FIX_EFLAGS	(X86_EFLAGS_AC | X86_EFLAGS_RF |		 \
+			 X86_EFLAGS_OF | X86_EFLAGS_DF |		 \
 			 X86_EFLAGS_TF | X86_EFLAGS_SF | X86_EFLAGS_ZF | \
 			 X86_EFLAGS_AF | X86_EFLAGS_PF | X86_EFLAGS_CF)