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-rw-r--r--arch/x86/mm/pat.c27
1 files changed, 20 insertions, 7 deletions
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 60adbe22efa0..1a82f4db8a46 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -42,6 +42,19 @@ static int nopat(char *str)
early_param("nopat", nopat);
#endif
+
+static int debug_enable;
+static int __init pat_debug_setup(char *str)
+{
+ debug_enable = 1;
+ return 0;
+}
+__setup("debugpat", pat_debug_setup);
+
+#define dprintk(fmt, arg...) \
+ do { if (debug_enable) printk(KERN_INFO fmt, ##arg); } while (0)
+
+
static u64 __read_mostly boot_pat_state;
enum {
@@ -279,7 +292,7 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
struct memtype *saved_ptr;
if (parse->start >= end) {
- pr_debug("New Entry\n");
+ dprintk("New Entry\n");
list_add(&new_entry->nd, parse->nd.prev);
new_entry = NULL;
break;
@@ -329,7 +342,7 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
break;
}
- pr_debug("Overlap at 0x%Lx-0x%Lx\n",
+ dprintk("Overlap at 0x%Lx-0x%Lx\n",
saved_ptr->start, saved_ptr->end);
/* No conflict. Go ahead and add this new entry */
list_add(&new_entry->nd, saved_ptr->nd.prev);
@@ -381,7 +394,7 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
break;
}
- pr_debug(KERN_INFO "Overlap at 0x%Lx-0x%Lx\n",
+ dprintk("Overlap at 0x%Lx-0x%Lx\n",
saved_ptr->start, saved_ptr->end);
/* No conflict. Go ahead and add this new entry */
list_add(&new_entry->nd, &saved_ptr->nd);
@@ -403,16 +416,16 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
if (new_entry) {
/* No conflict. Not yet added to the list. Add to the tail */
list_add_tail(&new_entry->nd, &memtype_list);
- pr_debug("New Entry\n");
+ dprintk("New Entry\n");
}
if (ret_type) {
- pr_debug(
+ dprintk(
"reserve_memtype added 0x%Lx-0x%Lx, track %s, req %s, ret %s\n",
start, end, cattr_name(actual_type),
cattr_name(req_type), cattr_name(*ret_type));
} else {
- pr_debug(
+ dprintk(
"reserve_memtype added 0x%Lx-0x%Lx, track %s, req %s\n",
start, end, cattr_name(actual_type),
cattr_name(req_type));
@@ -453,7 +466,7 @@ int free_memtype(u64 start, u64 end)
current->comm, current->pid, start, end);
}
- pr_debug("free_memtype request 0x%Lx-0x%Lx\n", start, end);
+ dprintk("free_memtype request 0x%Lx-0x%Lx\n", start, end);
return err;
}