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-rw-r--r--arch/x86/mm/pageattr.c13
1 files changed, 4 insertions, 9 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 797f9f107cb..e17efed088c 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -153,7 +153,7 @@ static void __cpa_flush_all(void *arg)
153 */ 153 */
154 __flush_tlb_all(); 154 __flush_tlb_all();
155 155
156 if (cache && boot_cpu_data.x86_model >= 4) 156 if (cache && boot_cpu_data.x86 >= 4)
157 wbinvd(); 157 wbinvd();
158} 158}
159 159
@@ -208,20 +208,15 @@ static void cpa_flush_array(unsigned long *start, int numpages, int cache,
208 int in_flags, struct page **pages) 208 int in_flags, struct page **pages)
209{ 209{
210 unsigned int i, level; 210 unsigned int i, level;
211 unsigned long do_wbinvd = cache && numpages >= 1024; /* 4M threshold */
211 212
212 BUG_ON(irqs_disabled()); 213 BUG_ON(irqs_disabled());
213 214
214 on_each_cpu(__cpa_flush_range, NULL, 1); 215 on_each_cpu(__cpa_flush_all, (void *) do_wbinvd, 1);
215 216
216 if (!cache) 217 if (!cache || do_wbinvd)
217 return; 218 return;
218 219
219 /* 4M threshold */
220 if (numpages >= 1024) {
221 if (boot_cpu_data.x86_model >= 4)
222 wbinvd();
223 return;
224 }
225 /* 220 /*
226 * We only need to flush on one CPU, 221 * We only need to flush on one CPU,
227 * clflush is a MESI-coherent instruction that 222 * clflush is a MESI-coherent instruction that