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Subject[PATCH 1/3] rename alloc_pages_exact()
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alloc_pages_exact() returns a virtual address. But, alloc_pages() returns
a 'struct page *'. That makes for very confused kernel hackers.

__get_free_pages(), on the other hand, returns virtual addresses. That
makes alloc_pages_exact() a much closer match to __get_free_pages(), so
rename it to get_free_pages_exact(). Also change the arguments to have
flags first, just like __get_free_pages().

Note that alloc_pages_exact()'s partner, free_pages_exact() already
matches free_pages(), so we do not have to touch the free side of things.

Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: David Rientjes <rientjes@google.com>
---
linux-2.6.git-dave/drivers/video/fsl-diu-fb.c | 2 +-
linux-2.6.git-dave/drivers/video/mxsfb.c | 2 +-
linux-2.6.git-dave/drivers/video/pxafb.c | 6 +++---
linux-2.6.git-dave/drivers/virtio/virtio_pci.c | 2 +-
linux-2.6.git-dave/include/linux/gfp.h | 2 +-
linux-2.6.git-dave/kernel/profile.c | 4 ++--
linux-2.6.git-dave/mm/page_alloc.c | 18 +++++++++---------
linux-2.6.git-dave/mm/page_cgroup.c | 2 +-
8 files changed, 19 insertions(+), 19 deletions(-)
diff -puN drivers/video/fsl-diu-fb.c~change-alloc_pages_exact-name drivers/video/fsl-diu-fb.c
--- linux-2.6.git/drivers/video/fsl-diu-fb.c~change-alloc_pages_exact-name 2011-04-11 15:01:16.453823153 -0700
+++ linux-2.6.git-dave/drivers/video/fsl-diu-fb.c 2011-04-11 15:01:16.489823137 -0700
@@ -294,7 +294,7 @@ static void *fsl_diu_alloc(size_t size,

pr_debug("size=%zu\n", size);

- virt = alloc_pages_exact(size, GFP_DMA | __GFP_ZERO);
+ virt = get_free_pages_exact(GFP_DMA | __GFP_ZERO, size);
if (virt) {
*phys = virt_to_phys(virt);
pr_debug("virt=%p phys=%llx\n", virt,
diff -puN drivers/video/mxsfb.c~change-alloc_pages_exact-name drivers/video/mxsfb.c
--- linux-2.6.git/drivers/video/mxsfb.c~change-alloc_pages_exact-name 2011-04-11 15:01:16.457823151 -0700
+++ linux-2.6.git-dave/drivers/video/mxsfb.c 2011-04-11 15:01:16.489823137 -0700
@@ -718,7 +718,7 @@ static int __devinit mxsfb_init_fbinfo(s
} else {
if (!fb_size)
fb_size = SZ_2M; /* default */
- fb_virt = alloc_pages_exact(fb_size, GFP_DMA);
+ fb_virt = get_free_pages_exact(GFP_DMA, fb_size);
if (!fb_virt)
return -ENOMEM;

diff -puN drivers/video/pxafb.c~change-alloc_pages_exact-name drivers/video/pxafb.c
--- linux-2.6.git/drivers/video/pxafb.c~change-alloc_pages_exact-name 2011-04-11 15:01:16.461823149 -0700
+++ linux-2.6.git-dave/drivers/video/pxafb.c 2011-04-11 15:01:16.493823135 -0700
@@ -905,8 +905,8 @@ static int __devinit pxafb_overlay_map_v
/* We assume that user will use at most video_mem_size for overlay fb,
* anyway, it's useless to use 16bpp main plane and 24bpp overlay
*/
- ofb->video_mem = alloc_pages_exact(PAGE_ALIGN(pxafb->video_mem_size),
- GFP_KERNEL | __GFP_ZERO);
+ ofb->video_mem = get_free_pages_exact(GFP_KERNEL | __GFP_ZERO,
+ PAGE_ALIGN(pxafb->video_mem_size));
if (ofb->video_mem == NULL)
return -ENOMEM;

@@ -1714,7 +1714,7 @@ static int __devinit pxafb_init_video_me
{
int size = PAGE_ALIGN(fbi->video_mem_size);

- fbi->video_mem = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
+ fbi->video_mem = get_free_pages_exact(GFP_KERNEL | __GFP_ZERO, size);
if (fbi->video_mem == NULL)
return -ENOMEM;

diff -puN drivers/virtio/virtio_pci.c~change-alloc_pages_exact-name drivers/virtio/virtio_pci.c
--- linux-2.6.git/drivers/virtio/virtio_pci.c~change-alloc_pages_exact-name 2011-04-11 15:01:16.465823147 -0700
+++ linux-2.6.git-dave/drivers/virtio/virtio_pci.c 2011-04-11 15:01:16.493823135 -0700
@@ -385,7 +385,7 @@ static struct virtqueue *setup_vq(struct
info->msix_vector = msix_vec;

size = PAGE_ALIGN(vring_size(num, VIRTIO_PCI_VRING_ALIGN));
- info->queue = alloc_pages_exact(size, GFP_KERNEL|__GFP_ZERO);
+ info->queue = get_free_pages_exact(GFP_KERNEL|__GFP_ZERO, size);
if (info->queue == NULL) {
err = -ENOMEM;
goto out_info;
diff -puN include/linux/gfp.h~change-alloc_pages_exact-name include/linux/gfp.h
--- linux-2.6.git/include/linux/gfp.h~change-alloc_pages_exact-name 2011-04-11 15:01:16.469823145 -0700
+++ linux-2.6.git-dave/include/linux/gfp.h 2011-04-11 15:01:16.493823135 -0700
@@ -351,7 +351,7 @@ extern struct page *alloc_pages_vma(gfp_
extern unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order);
extern unsigned long get_zeroed_page(gfp_t gfp_mask);

-void *alloc_pages_exact(size_t size, gfp_t gfp_mask);
+void *get_free_pages_exact(gfp_t gfp_mask, size_t size);
void free_pages_exact(void *virt, size_t size);

#define __get_free_page(gfp_mask) \
diff -puN kernel/profile.c~change-alloc_pages_exact-name kernel/profile.c
--- linux-2.6.git/kernel/profile.c~change-alloc_pages_exact-name 2011-04-11 15:01:16.473823143 -0700
+++ linux-2.6.git-dave/kernel/profile.c 2011-04-11 15:01:16.497823133 -0700
@@ -121,8 +121,8 @@ int __ref profile_init(void)
if (prof_buffer)
return 0;

- prof_buffer = alloc_pages_exact(buffer_bytes,
- GFP_KERNEL|__GFP_ZERO|__GFP_NOWARN);
+ prof_buffer = get_free_pages_exact(GFP_KERNEL|__GFP_ZERO|__GFP_NOWARN,
+ buffer_bytes);
if (prof_buffer)
return 0;

diff -puN mm/page_alloc.c~change-alloc_pages_exact-name mm/page_alloc.c
--- linux-2.6.git/mm/page_alloc.c~change-alloc_pages_exact-name 2011-04-11 15:01:16.477823141 -0700
+++ linux-2.6.git-dave/mm/page_alloc.c 2011-04-11 15:01:16.501823131 -0700
@@ -2318,7 +2318,7 @@ void free_pages(unsigned long addr, unsi
EXPORT_SYMBOL(free_pages);

/**
- * alloc_pages_exact - allocate an exact number physically-contiguous pages.
+ * get_free_pages_exact - allocate an exact number physically-contiguous pages.
* @size: the number of bytes to allocate
* @gfp_mask: GFP flags for the allocation
*
@@ -2330,7 +2330,7 @@ EXPORT_SYMBOL(free_pages);
*
* Memory allocated by this function must be released by free_pages_exact().
*/
-void *alloc_pages_exact(size_t size, gfp_t gfp_mask)
+void *get_free_pages_exact(gfp_t gfp_mask, size_t size)
{
unsigned int order = get_order(size);
unsigned long addr;
@@ -2349,14 +2349,14 @@ void *alloc_pages_exact(size_t size, gfp

return (void *)addr;
}
-EXPORT_SYMBOL(alloc_pages_exact);
+EXPORT_SYMBOL(get_free_pages_exact);

/**
- * free_pages_exact - release memory allocated via alloc_pages_exact()
- * @virt: the value returned by alloc_pages_exact.
- * @size: size of allocation, same value as passed to alloc_pages_exact().
+ * free_pages_exact - release memory allocated via get_free_pages_exact()
+ * @virt: the value returned by get_free_pages_exact.
+ * @size: size of allocation, same value as passed to get_free_pages_exact().
*
- * Release the memory allocated by a previous call to alloc_pages_exact.
+ * Release the memory allocated by a previous call to get_free_pages_exact().
*/
void free_pages_exact(void *virt, size_t size)
{
@@ -5308,10 +5308,10 @@ void *__init alloc_large_system_hash(con
/*
* If bucketsize is not a power-of-two, we may free
* some pages at the end of hash table which
- * alloc_pages_exact() automatically does
+ * get_free_pages_exact() automatically does
*/
if (get_order(size) < MAX_ORDER) {
- table = alloc_pages_exact(size, GFP_ATOMIC);
+ table = get_free_pages_exact(size, GFP_ATOMIC);
kmemleak_alloc(table, size, 1, GFP_ATOMIC);
}
}
diff -puN mm/page_cgroup.c~change-alloc_pages_exact-name mm/page_cgroup.c
--- linux-2.6.git/mm/page_cgroup.c~change-alloc_pages_exact-name 2011-04-11 15:01:16.481823139 -0700
+++ linux-2.6.git-dave/mm/page_cgroup.c 2011-04-11 15:01:16.501823131 -0700
@@ -134,7 +134,7 @@ static void *__init_refok alloc_page_cgr
{
void *addr = NULL;

- addr = alloc_pages_exact(size, GFP_KERNEL | __GFP_NOWARN);
+ addr = get_free_pages_exact(GFP_KERNEL | __GFP_NOWARN, size);
if (addr)
return addr;

_

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