i386: Retrieve CLFLUSH size from CPUID

Also report it in /proc/cpuinfo similar to x86-64. 

Needed for followon patch

Signed-off-by: Andi Kleen <ak@suse.de>

---
 arch/i386/kernel/cpu/common.c |    3 +++
 arch/i386/kernel/cpu/proc.c   |    3 ++-
 include/asm-i386/processor.h  |    1 +
 3 files changed, 6 insertions(+), 1 deletion(-)

Index: linux/arch/i386/kernel/cpu/common.c
===================================================================
--- linux.orig/arch/i386/kernel/cpu/common.c
+++ linux/arch/i386/kernel/cpu/common.c
@@ -309,6 +309,8 @@ static void __cpuinit generic_identify(s
 #else
 			c->apicid = (ebx >> 24) & 0xFF;
 #endif
+			if (c->x86_capability[0] & (1<<19))
+				c->x86_clflush_size = ((ebx >> 8) & 0xff) * 8;
 		} else {
 			/* Have CPUID level 0 only - unheard of */
 			c->x86 = 4;
@@ -373,6 +375,7 @@ void __cpuinit identify_cpu(struct cpuin
 	c->x86_vendor_id[0] = '\0'; /* Unset */
 	c->x86_model_id[0] = '\0';  /* Unset */
 	c->x86_max_cores = 1;
+	c->x86_clflush_size = 32;
 	memset(&c->x86_capability, 0, sizeof c->x86_capability);
 
 	if (!have_cpuid_p()) {
Index: linux/include/asm-i386/processor.h
===================================================================
--- linux.orig/include/asm-i386/processor.h
+++ linux/include/asm-i386/processor.h
@@ -72,6 +72,7 @@ struct cpuinfo_x86 {
 #endif
 	unsigned char x86_max_cores;	/* cpuid returned max cores value */
 	unsigned char apicid;
+	unsigned short x86_clflush_size;
 #ifdef CONFIG_SMP
 	unsigned char booted_cores;	/* number of cores as seen by OS */
 	__u8 phys_proc_id; 		/* Physical processor id. */
Index: linux/arch/i386/kernel/cpu/proc.c
===================================================================
--- linux.orig/arch/i386/kernel/cpu/proc.c
+++ linux/arch/i386/kernel/cpu/proc.c
@@ -152,9 +152,10 @@ static int show_cpuinfo(struct seq_file 
 				seq_printf(m, " [%d]", i);
 		}
 
-	seq_printf(m, "\nbogomips\t: %lu.%02lu\n\n",
+	seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
 		     c->loops_per_jiffy/(500000/HZ),
 		     (c->loops_per_jiffy/(5000/HZ)) % 100);
+	seq_printf(m, "clflush size\t: %u\n\n", c->x86_clflush_size);
 
 	return 0;
 }