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mm: export __get_user_pages

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In most cases, get_user_pages and get_user_pages_fast should be used
to pin user pages in memory.  But sometimes, some special flags except
FOLL_GET, FOLL_WRITE and FOLL_FORCE are needed, for example in
following patch, KVM needs FOLL_HWPOISON.  To support these users,
__get_user_pages is exported directly.

There are some symbol name conflicts in infiniband driver, fixed them too.

Signed-off-by: Huang Ying <[email protected]>
CC: Andrew Morton <[email protected]>
CC: Michel Lespinasse <[email protected]>
CC: Roland Dreier <[email protected]>
CC: Ralph Campbell <[email protected]>
Signed-off-by: Marcelo Tosatti <[email protected]>
This commit is contained in:
Huang Ying 2011-01-30 11:15:47 +08:00 • committed by Marcelo Tosatti
commit 0014bd990e
5 changed files with 60 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

6
drivers/infiniband/hw/ipath/ipath_user_pages.c
View file

@ -53,8 +53,8 @@ static void __ipath_release_user_pages(struct page **p, size_t num_pages,
}
/* call with current->mm->mmap_sem held */
static int __get_user_pages(unsigned long start_page, size_t num_pages,
struct page **p, struct vm_area_struct **vma)
static int __ipath_get_user_pages(unsigned long start_page, size_t num_pages,
struct page **p, struct vm_area_struct **vma)
{
unsigned long lock_limit;
size_t got;
@ -165,7 +165,7 @@ int ipath_get_user_pages(unsigned long start_page, size_t num_pages,
down_write(&current->mm->mmap_sem);
ret = __get_user_pages(start_page, num_pages, p, NULL);
ret = __ipath_get_user_pages(start_page, num_pages, p, NULL);
up_write(&current->mm->mmap_sem);

6
drivers/infiniband/hw/qib/qib_user_pages.c
View file

@ -51,8 +51,8 @@ static void __qib_release_user_pages(struct page **p, size_t num_pages,
/*
* Call with current->mm->mmap_sem held.
*/
static int __get_user_pages(unsigned long start_page, size_t num_pages,
struct page **p, struct vm_area_struct **vma)
static int __qib_get_user_pages(unsigned long start_page, size_t num_pages,
struct page **p, struct vm_area_struct **vma)
{
unsigned long lock_limit;
size_t got;
@ -136,7 +136,7 @@ int qib_get_user_pages(unsigned long start_page, size_t num_pages,
down_write(&current->mm->mmap_sem);
ret = __get_user_pages(start_page, num_pages, p, NULL);
ret = __qib_get_user_pages(start_page, num_pages, p, NULL);
up_write(&current->mm->mmap_sem);