__get_user_pages_locked(): get rid of notify_drop argument

The only caller that doesn't pass true in it is get_user_pages() and
it passes NULL in locked.  The only place where we check it is
	if (notify_locked && lock_dropped && *locked)
and lock_dropped can become true only if we have locked != NULL.
In other words, the second part of condition will be false when
called by get_user_pages().

Just get rid of the argument and turn the condition into
	if (lock_dropped && *locked)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/mm/gup.c b/mm/gup.c
index 9418cbb..6101579 100644 (file)
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -848,7 +848,7 @@ static __always_inline long __get_user_pages_locked(struct task_struct *tsk,
                                                unsigned long nr_pages,
                                                struct page **pages,
                                                struct vm_area_struct **vmas,
-                                               int *locked, bool notify_drop,
+                                               int *locked,
                                                unsigned int flags)
 {
        long ret, pages_done;
@@ -922,7 +922,7 @@ static __always_inline long __get_user_pages_locked(struct task_struct *tsk,
                pages++;
                start += PAGE_SIZE;
        }
-       if (notify_drop && lock_dropped && *locked) {
+       if (lock_dropped && *locked) {
                /*
                 * We must let the caller know we temporarily dropped the lock
                 * and so the critical section protected by it was lost.
@@ -959,7 +959,7 @@ long get_user_pages_locked(unsigned long start, unsigned long nr_pages,
                           int *locked)
 {
        return __get_user_pages_locked(current, current->mm, start, nr_pages,
-                                      pages, NULL, locked, true,
+                                      pages, NULL, locked,
                                       gup_flags | FOLL_TOUCH);
 }
 EXPORT_SYMBOL(get_user_pages_locked);
@@ -988,7 +988,7 @@ long get_user_pages_unlocked(unsigned long start, unsigned long nr_pages,
 
        down_read(&mm->mmap_sem);
        ret = __get_user_pages_locked(current, mm, start, nr_pages, pages, NULL,
-                                     &locked, true, gup_flags | FOLL_TOUCH);
+                                     &locked, gup_flags | FOLL_TOUCH);
        if (locked)
                up_read(&mm->mmap_sem);
        return ret;
@@ -1057,7 +1057,7 @@ long get_user_pages_remote(struct task_struct *tsk, struct mm_struct *mm,
                struct vm_area_struct **vmas, int *locked)
 {
        return __get_user_pages_locked(tsk, mm, start, nr_pages, pages, vmas,
-                                      locked, true,
+                                      locked,
                                       gup_flags | FOLL_TOUCH | FOLL_REMOTE);
 }
 EXPORT_SYMBOL(get_user_pages_remote);
@@ -1074,7 +1074,7 @@ long get_user_pages(unsigned long start, unsigned long nr_pages,
                struct vm_area_struct **vmas)
 {
        return __get_user_pages_locked(current, current->mm, start, nr_pages,
-                                      pages, vmas, NULL, false,
+                                      pages, vmas, NULL,
                                       gup_flags | FOLL_TOUCH);
 }
 EXPORT_SYMBOL(get_user_pages);