linux-kernel - [-mm patch] lguest: remove check_bug

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Date:	Sun, 25 Mar 2007 16:57:28 +0200
From:	Adrian Bunk <bunk@...sta.de>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: [-mm patch] lguest: remove check_bug_kill()

On Sun, Mar 25, 2007 at 05:33:45PM +1000, Rusty Russell wrote:
> On Sat, 2007-03-24 at 14:06 +0100, Adrian Bunk wrote:
> > On Mon, Mar 19, 2007 at 08:56:23PM -0800, Andrew Morton wrote:
> > >...
> > > Changes since 2.6.21-rc3-mm1:
> > >...
> > > +lguest-use-read-only-pages-rather-than-segments-to-protect-high-mapped-switcher.patch
> > >...
> > >  x86/x86_64 updates
> > >...
> > 
> > 
> > check_bug_kill() is no longer used.
> 
> Thanks Adrian, that was actually an oversight.  However, this function
> is most useful in early bringup, so I didn't notice it was gone.
> 
> I'd prefer a patch which eliminates it altogether, rather than #if 0 it
> out.

Patch below.

> Thanks!
> Rusty.

cu
Adrian


<--  snip  -->


check_bug_kill() is no longer used.

Signed-off-by: Adrian Bunk <bunk@...sta.de>

---

 arch/i386/lguest/interrupts_and_traps.c |   27 ------------------------
 arch/i386/lguest/lg.h                   |    1 
 2 files changed, 28 deletions(-)

--- linux-2.6.21-rc4-mm1/arch/i386/lguest/lg.h.old	2007-03-25 14:38:22.000000000 +0200
+++ linux-2.6.21-rc4-mm1/arch/i386/lguest/lg.h	2007-03-25 14:41:13.000000000 +0200
@@ -195,7 +195,6 @@
 /* interrupts_and_traps.c: */
 void maybe_do_interrupt(struct lguest *lg);
 int deliver_trap(struct lguest *lg, unsigned int num);
-void check_bug_kill(struct lguest *lg);
 void load_guest_idt_entry(struct lguest *lg, unsigned int i, u32 low, u32 hi);
 void pin_stack_pages(struct lguest *lg);
 void pin_trap_pages(struct lguest *lg);
--- linux-2.6.21-rc4-mm1/arch/i386/lguest/interrupts_and_traps.c.old	2007-03-25 14:38:46.000000000 +0200
+++ linux-2.6.21-rc4-mm1/arch/i386/lguest/interrupts_and_traps.c	2007-03-25 14:41:25.000000000 +0200
@@ -118,33 +118,6 @@
 	return 1;
 }
 
-void check_bug_kill(struct lguest *lg)
-{
-#ifdef CONFIG_BUG
-	u32 eip = lg->regs->eip - PAGE_OFFSET;
-	u16 insn;
-
-	/* This only works for addresses in linear mapping... */
-	if (lg->regs->eip < PAGE_OFFSET)
-		return;
-	lhread(lg, &insn, eip, sizeof(insn));
-	if (insn == 0x0b0f) {
-#ifdef CONFIG_DEBUG_BUGVERBOSE
-		u16 l;
-		u32 f;
-		char file[128];
-		lhread(lg, &l, eip+sizeof(insn), sizeof(l));
-		lhread(lg, &f, eip+sizeof(insn)+sizeof(l), sizeof(f));
-		lhread(lg, file, f - PAGE_OFFSET, sizeof(file));
-		file[sizeof(file)-1] = 0;
-		kill_guest(lg, "BUG() at %#x %s:%u", eip, file, l);
-#else
-		kill_guest(lg, "BUG() at %#x", eip);
-#endif	/* CONFIG_DEBUG_BUGVERBOSE */
-	}
-#endif	/* CONFIG_BUG */
-}
-
 static int direct_trap(const struct lguest *lg,
 		       const struct desc_struct *trap,
 		       unsigned int num)

-
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