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Merge branch 'mm-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull mm gup cleanup from Ingo Molnar:
 "This removes the ugly get-user-pages API hack, now that all upstream
  code has been migrated to it"

("ugly" is putting it mildly. But it worked.. - Linus)

* 'mm-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  mm/gup: Remove the macro overload API migration helpers from the get_user*() APIs
This commit is contained in:
Linus Torvalds
2016-04-14 19:31:34 -07:00
parent 63a1281b65 c12d2da56d
commit a1f983174d
3 changed files with 17 additions and 143 deletions
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64
include/linux/mm.h
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@@ -1250,78 +1250,20 @@ long get_user_pages_remote(struct task_struct *tsk, struct mm_struct *mm,
unsigned long start, unsigned long nr_pages,
int write, int force, struct page **pages,
struct vm_area_struct **vmas);
long get_user_pages6(unsigned long start, unsigned long nr_pages,
long get_user_pages(unsigned long start, unsigned long nr_pages,
int write, int force, struct page **pages,
struct vm_area_struct **vmas);
long get_user_pages_locked6(unsigned long start, unsigned long nr_pages,
long get_user_pages_locked(unsigned long start, unsigned long nr_pages,
int write, int force, struct page **pages, int *locked);
long __get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm,
unsigned long start, unsigned long nr_pages,
int write, int force, struct page **pages,
unsigned int gup_flags);
long get_user_pages_unlocked5(unsigned long start, unsigned long nr_pages,
long get_user_pages_unlocked(unsigned long start, unsigned long nr_pages,
int write, int force, struct page **pages);
int get_user_pages_fast(unsigned long start, int nr_pages, int write,
struct page **pages);
/* suppress warnings from use in EXPORT_SYMBOL() */
#ifndef __DISABLE_GUP_DEPRECATED
#define __gup_deprecated __deprecated
#else
#define __gup_deprecated
#endif
/*
* These macros provide backward-compatibility with the old
* get_user_pages() variants which took tsk/mm. These
* functions/macros provide both compile-time __deprecated so we
* can catch old-style use and not break the build. The actual
* functions also have WARN_ON()s to let us know at runtime if
* the get_user_pages() should have been the "remote" variant.
*
* These are hideous, but temporary.
*
* If you run into one of these __deprecated warnings, look
* at how you are calling get_user_pages(). If you are calling
* it with current/current->mm as the first two arguments,
* simply remove those arguments. The behavior will be the same
* as it is now. If you are calling it on another task, use
* get_user_pages_remote() instead.
*
* Any questions? Ask Dave Hansen <dave@sr71.net>
*/
long
__gup_deprecated
get_user_pages8(struct task_struct *tsk, struct mm_struct *mm,
unsigned long start, unsigned long nr_pages,
int write, int force, struct page **pages,
struct vm_area_struct **vmas);
#define GUP_MACRO(_1, _2, _3, _4, _5, _6, _7, _8, get_user_pages, ...) \
get_user_pages
#define get_user_pages(...) GUP_MACRO(__VA_ARGS__, \
get_user_pages8, x, \
get_user_pages6, x, x, x, x, x)(__VA_ARGS__)
__gup_deprecated
long get_user_pages_locked8(struct task_struct *tsk, struct mm_struct *mm,
unsigned long start, unsigned long nr_pages,
int write, int force, struct page **pages,
int *locked);
#define GUPL_MACRO(_1, _2, _3, _4, _5, _6, _7, _8, get_user_pages_locked, ...) \
get_user_pages_locked
#define get_user_pages_locked(...) GUPL_MACRO(__VA_ARGS__, \
get_user_pages_locked8, x, \
get_user_pages_locked6, x, x, x, x)(__VA_ARGS__)
__gup_deprecated
long get_user_pages_unlocked7(struct task_struct *tsk, struct mm_struct *mm,
unsigned long start, unsigned long nr_pages,
int write, int force, struct page **pages);
#define GUPU_MACRO(_1, _2, _3, _4, _5, _6, _7, get_user_pages_unlocked, ...) \
get_user_pages_unlocked
#define get_user_pages_unlocked(...) GUPU_MACRO(__VA_ARGS__, \
get_user_pages_unlocked7, x, \
get_user_pages_unlocked5, x, x, x, x)(__VA_ARGS__)
/* Container for pinned pfns / pages */
struct frame_vector {
unsigned int nr_allocated; /* Number of frames we have space for */