A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 03:27:44 -04:00
Code Issues Projects Releases Packages Wiki Activity

Merge branch 'core/locking' into core/urgent

Browse source
This commit is contained in:
Ingo Molnar 2008-08-12 00:11:49 +02:00
commit 23a0ee908c
15 changed files with 366 additions and 146 deletions
Download patch file Download diff file Expand all files Collapse all files

20
mm/mmap.c
View file

@ -2273,14 +2273,14 @@ int install_special_mapping(struct mm_struct *mm,
static DEFINE_MUTEX(mm_all_locks_mutex);
static void vm_lock_anon_vma(struct anon_vma *anon_vma)
static void vm_lock_anon_vma(struct mm_struct *mm, struct anon_vma *anon_vma)
{
if (!test_bit(0, (unsigned long *) &anon_vma->head.next)) {
/*
* The LSB of head.next can't change from under us
* because we hold the mm_all_locks_mutex.
*/
spin_lock(&anon_vma->lock);
spin_lock_nest_lock(&anon_vma->lock, &mm->mmap_sem);
/*
* We can safely modify head.next after taking the
* anon_vma->lock. If some other vma in this mm shares
@ -2296,7 +2296,7 @@ static void vm_lock_anon_vma(struct anon_vma *anon_vma)
}
}
static void vm_lock_mapping(struct address_space *mapping)
static void vm_lock_mapping(struct mm_struct *mm, struct address_space *mapping)
{
if (!test_bit(AS_MM_ALL_LOCKS, &mapping->flags)) {
/*
@ -2310,7 +2310,7 @@ static void vm_lock_mapping(struct address_space *mapping)
*/
if (test_and_set_bit(AS_MM_ALL_LOCKS, &mapping->flags))
BUG();
spin_lock(&mapping->i_mmap_lock);
spin_lock_nest_lock(&mapping->i_mmap_lock, &mm->mmap_sem);
}
}
@ -2358,11 +2358,17 @@ int mm_take_all_locks(struct mm_struct *mm)
for (vma = mm->mmap; vma; vma = vma->vm_next) {
if (signal_pending(current))
goto out_unlock;
if (vma->anon_vma)
vm_lock_anon_vma(vma->anon_vma);
if (vma->vm_file && vma->vm_file->f_mapping)
vm_lock_mapping(vma->vm_file->f_mapping);
vm_lock_mapping(mm, vma->vm_file->f_mapping);
}
for (vma = mm->mmap; vma; vma = vma->vm_next) {
if (signal_pending(current))
goto out_unlock;
if (vma->anon_vma)
vm_lock_anon_vma(mm, vma->anon_vma);
}
ret = 0;
out_unlock: