tree wide: use kvfree() than conditional kfree()/vfree()

There are many locations that do

  if (memory_was_allocated_by_vmalloc)
    vfree(ptr);
  else
    kfree(ptr);

but kvfree() can handle both kmalloc()ed memory and vmalloc()ed memory
using is_vmalloc_addr().  Unless callers have special reasons, we can
replace this branch with kvfree().  Please check and reply if you found
problems.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Jan Kara <jack@suse.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Acked-by: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Acked-by: David Rientjes <rientjes@google.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Oleg Drokin <oleg.drokin@intel.com>
Cc: Boris Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 12 deletions

diff --git a/drivers/char/mspec.c b/drivers/char/mspec.c
index f1d7fa4..f3f92d5 100644
--- a/drivers/char/mspec.c
+++ b/drivers/char/mspec.c
@@ -93,14 +93,11 @@ struct vma_data {
 	spinlock_t lock;	/* Serialize access to this structure. */
 	int count;		/* Number of pages allocated. */
 	enum mspec_page_type type; /* Type of pages allocated. */
-	int flags;		/* See VMD_xxx below. */
 	unsigned long vm_start;	/* Original (unsplit) base. */
 	unsigned long vm_end;	/* Original (unsplit) end. */
 	unsigned long maddr[0];	/* Array of MSPEC addresses. */
 };
 
-#define VMD_VMALLOCED 0x1	/* vmalloc'd rather than kmalloc'd */
-
 /* used on shub2 to clear FOP cache in the HUB */
 static unsigned long scratch_page[MAX_NUMNODES];
 #define SH2_AMO_CACHE_ENTRIES	4
@@ -185,10 +182,7 @@ mspec_close(struct vm_area_struct *vma)
 			       "failed to zero page %ld\n", my_page);
 	}
 
-	if (vdata->flags & VMD_VMALLOCED)
-		vfree(vdata);
-	else
-		kfree(vdata);
+	kvfree(vdata);
 }
 
 /*
@@ -256,7 +250,7 @@ mspec_mmap(struct file *file, struct vm_area_struct *vma,
 					enum mspec_page_type type)
 {
 	struct vma_data *vdata;
-	int pages, vdata_size, flags = 0;
+	int pages, vdata_size;
 
 	if (vma->vm_pgoff != 0)
 		return -EINVAL;
@@ -271,16 +265,13 @@ mspec_mmap(struct file *file, struct vm_area_struct *vma,
 	vdata_size = sizeof(struct vma_data) + pages * sizeof(long);
 	if (vdata_size <= PAGE_SIZE)
 		vdata = kzalloc(vdata_size, GFP_KERNEL);
-	else {
+	else
 		vdata = vzalloc(vdata_size);
-		flags = VMD_VMALLOCED;
-	}
 	if (!vdata)
 		return -ENOMEM;
 
 	vdata->vm_start = vma->vm_start;
 	vdata->vm_end = vma->vm_end;
-	vdata->flags = flags;
 	vdata->type = type;
 	spin_lock_init(&vdata->lock);
 	atomic_set(&vdata->refcnt, 1);