linux-kernel - [PATCH 7/7] mspec: use simple_malloc()/simple

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Date:	Sun, 16 Nov 2008 12:34:13 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	Jes Sorensen <jes@....com>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH 7/7] mspec: use simple_malloc()/simple_free()


use simple_malloc()/simple_free() instead of current codes.
and avoid use VMD_VMALLOCED flags

Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
---
diff --git a/drivers/char/mspec.c b/drivers/char/mspec.c
index 30f095a..2a814f8 100644
--- a/drivers/char/mspec.c
+++ b/drivers/char/mspec.c
@@ -94,14 +94,11 @@ 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
@@ -186,10 +183,7 @@ 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);
+	simple_free(vdata);
 }
 
 /*
@@ -257,7 +251,7 @@ 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;
@@ -270,19 +264,13 @@ mspec_mmap(struct file *file, struct vm_area_struct *vma,
 
 	pages = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
 	vdata_size = sizeof(struct vma_data) + pages * sizeof(long);
-	if (vdata_size <= PAGE_SIZE)
-		vdata = kmalloc(vdata_size, GFP_KERNEL);
-	else {
-		vdata = vmalloc(vdata_size);
-		flags = VMD_VMALLOCED;
-	}
+	vdata = simple_malloc(vdata_size);
 	if (!vdata)
 		return -ENOMEM;
 	memset(vdata, 0, vdata_size);
 
 	vdata->vm_start = vma->vm_start;
 	vdata->vm_end = vma->vm_end;
-	vdata->flags = flags;
 	vdata->type = type;
 	spin_lock_init(&vdata->lock);
 	vdata->refcnt = ATOMIC_INIT(1);

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