patch-2.1.25 linux/arch/i386/kernel/smp.c

• Lines: 22
• Date: Sun Feb 2 15:18:30 1997
• Orig file: v2.1.24/linux/arch/i386/kernel/smp.c
• Orig date: Sun Feb 2 15:46:19 1997

diff -u --recursive --new-file v2.1.24/linux/arch/i386/kernel/smp.c linux/arch/i386/kernel/smp.c
@@ -22,6 +22,7 @@
  *	Matthias Sattler	:	Changes for 2.1 kernel map.
  *	Michel Lespinasse	:	Changes for 2.1 kernel map.
  *	Michael Chastain	:	Change trampoline.S to gnu as.
+ *		Alan Cox	:	Dumb bug: 'B' step PPro's are fine
  *
  */
 
@@ -573,8 +574,11 @@
 	c->x86=x86;
 	c->x86_model=x86_model;
 	c->x86_mask=x86_mask;
-	if(x86_mask>=1 && x86_mask<=4)
-		smp_b_stepping=1;		/* Remember we have B step CPUs */
+	/*
+	 *	Mask B, Pentium, but not Pentium MMX
+	 */
+	if(x86_mask>=1 && x86_mask<=4 && x86==5 && (x86_model>=0&&x86_model<=3))
+		smp_b_stepping=1;		/* Remember we have B step Pentia with bugs */
 	c->x86_capability=x86_capability;
 	c->fdiv_bug=fdiv_bug;
 	c->wp_works_ok=wp_works_ok;		/* Always assumed the same currently */