From: Daniel Jacobowitz <dan@debian.org>
Date: Sun, 27 Nov 2005 03:34:41 +0000 (-0500)
Subject: [MIPS] Generate SIGILL again
X-Git-Tag: firefly_0821_release~39726^2~8
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=56ebd51bae72c2e47c83f6eacf258479d5658ec8;p=firefly-linux-kernel-4.4.55.git

[MIPS] Generate SIGILL again

The rdhwr emulation accidentally swallowed the SIGILL from most other
illegal instructions.  Make sure to return -EFAULT by default.

Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 6f3ff9690686..7058893d5ad2 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -534,13 +534,14 @@ static inline int simulate_rdhwr(struct pt_regs *regs)
 		switch (rd) {
 			case 29:
 				regs->regs[rt] = ti->tp_value;
-				break;
+				return 0;
 			default:
 				return -EFAULT;
 		}
 	}
 
-	return 0;
+	/* Not ours.  */
+	return -EFAULT;
 }
 
 asmlinkage void do_ov(struct pt_regs *regs)