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-rw-r--r--arch/x86/mm/pat.c10
-rw-r--r--arch/x86/mm/pat_internal.h6
-rw-r--r--arch/x86/mm/pat_rbtree.c7
3 files changed, 14 insertions, 9 deletions
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index bbe5502ee1cb..acc15b23b743 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -336,6 +336,7 @@ int free_memtype(u64 start, u64 end)
{
int err = -EINVAL;
int is_range_ram;
+ struct memtype *entry;
if (!pat_enabled)
return 0;
@@ -355,17 +356,20 @@ int free_memtype(u64 start, u64 end)
}
spin_lock(&memtype_lock);
- err = rbt_memtype_erase(start, end);
+ entry = rbt_memtype_erase(start, end);
spin_unlock(&memtype_lock);
- if (err) {
+ if (!entry) {
printk(KERN_INFO "%s:%d freeing invalid memtype %Lx-%Lx\n",
current->comm, current->pid, start, end);
+ return -EINVAL;
}
+ kfree(entry);
+
dprintk("free_memtype request 0x%Lx-0x%Lx\n", start, end);
- return err;
+ return 0;
}
diff --git a/arch/x86/mm/pat_internal.h b/arch/x86/mm/pat_internal.h
index 4f39eefa3e61..77e5ba153fac 100644
--- a/arch/x86/mm/pat_internal.h
+++ b/arch/x86/mm/pat_internal.h
@@ -28,15 +28,15 @@ static inline char *cattr_name(unsigned long flags)
#ifdef CONFIG_X86_PAT
extern int rbt_memtype_check_insert(struct memtype *new,
unsigned long *new_type);
-extern int rbt_memtype_erase(u64 start, u64 end);
+extern struct memtype *rbt_memtype_erase(u64 start, u64 end);
extern struct memtype *rbt_memtype_lookup(u64 addr);
extern int rbt_memtype_copy_nth_element(struct memtype *out, loff_t pos);
#else
static inline int rbt_memtype_check_insert(struct memtype *new,
unsigned long *new_type)
{ return 0; }
-static inline int rbt_memtype_erase(u64 start, u64 end)
-{ return 0; }
+static inline struct memtype *rbt_memtype_erase(u64 start, u64 end)
+{ return NULL; }
static inline struct memtype *rbt_memtype_lookup(u64 addr)
{ return NULL; }
static inline int rbt_memtype_copy_nth_element(struct memtype *out, loff_t pos)
diff --git a/arch/x86/mm/pat_rbtree.c b/arch/x86/mm/pat_rbtree.c
index 07de4cb8cc30..f537087bb740 100644
--- a/arch/x86/mm/pat_rbtree.c
+++ b/arch/x86/mm/pat_rbtree.c
@@ -231,16 +231,17 @@ int rbt_memtype_check_insert(struct memtype *new, unsigned long *ret_type)
return err;
}
-int rbt_memtype_erase(u64 start, u64 end)
+struct memtype *rbt_memtype_erase(u64 start, u64 end)
{
struct memtype *data;
data = memtype_rb_exact_match(&memtype_rbroot, start, end);
if (!data)
- return -EINVAL;
+ goto out;
rb_erase(&data->rb, &memtype_rbroot);
- return 0;
+out:
+ return data;
}
struct memtype *rbt_memtype_lookup(u64 addr)
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