vm_flags &= ~VM_SHARED;
vm_page_prot = vm_pgprot_modify(vm_page_prot, vm_flags);
}
- /* remove_protection_ptes reads vma->vm_page_prot without mmap_sem */
+ /* remove_protection_ptes reads vma->vm_page_prot without mmap_lock */
WRITE_ONCE(vma->vm_page_prot, vm_page_prot);
}
/*
* Always allow shrinking brk.
- * __do_munmap() may downgrade mmap_sem to read.
+ * __do_munmap() may downgrade mmap_lock to read.
*/
if (brk <= mm->brk) {
int ret;
/*
- * mm->brk must to be protected by write mmap_sem so update it
- * before downgrading mmap_sem. When __do_munmap() fails,
+ * mm->brk must to be protected by write mmap_lock so update it
+ * before downgrading mmap_lock. When __do_munmap() fails,
* mm->brk will be restored from origbrk.
*/
mm->brk = brk;
* After the update, the vma will be reinserted using
* anon_vma_interval_tree_post_update_vma().
*
- * The entire update must be protected by exclusive mmap_sem and by
+ * The entire update must be protected by exclusive mmap_lock and by
* the root anon_vma's mutex.
*/
static inline void
/*
* vma->vm_start/vm_end cannot change under us because the caller
- * is required to hold the mmap_sem in read mode. We need the
+ * is required to hold the mmap_lock in read mode. We need the
* anon_vma lock to serialize against concurrent expand_stacks.
*/
anon_vma_lock_write(vma->anon_vma);
if (!error) {
/*
* vma_gap_update() doesn't support concurrent
- * updates, but we only hold a shared mmap_sem
+ * updates, but we only hold a shared mmap_lock
* lock here, so we need to protect against
* concurrent vma expansions.
* anon_vma_lock_write() doesn't help here, as
/*
* vma->vm_start/vm_end cannot change under us because the caller
- * is required to hold the mmap_sem in read mode. We need the
+ * is required to hold the mmap_lock in read mode. We need the
* anon_vma lock to serialize against concurrent expand_stacks.
*/
anon_vma_lock_write(vma->anon_vma);
if (!error) {
/*
* vma_gap_update() doesn't support concurrent
- * updates, but we only hold a shared mmap_sem
+ * updates, but we only hold a shared mmap_lock
* lock here, so we need to protect against
* concurrent vma expansions.
* anon_vma_lock_write() doesn't help here, as
ret = __do_munmap(mm, start, len, &uf, downgrade);
/*
- * Returning 1 indicates mmap_sem is downgraded.
+ * Returning 1 indicates mmap_lock is downgraded.
* But 1 is not legal return value of vm_munmap() and munmap(), reset
* it to 0 before return.
*/
/*
* Manually reap the mm to free as much memory as possible.
* Then, as the oom reaper does, set MMF_OOM_SKIP to disregard
- * this mm from further consideration. Taking mm->mmap_sem for
+ * this mm from further consideration. Taking mm->mmap_lock for
* write after setting MMF_OOM_SKIP will guarantee that the oom
- * reaper will not run on this mm again after mmap_sem is
+ * reaper will not run on this mm again after mmap_lock is
* dropped.
*
- * Nothing can be holding mm->mmap_sem here and the above call
+ * Nothing can be holding mm->mmap_lock here and the above call
* to mmu_notifier_release(mm) ensures mmu notifier callbacks in
* __oom_reap_task_mm() will not block.
*
}
/*
- * Called with mm->mmap_sem held for writing.
+ * Called with mm->mmap_lock held for writing.
* Insert a new vma covering the given region, with the given flags.
* Its pages are supplied by the given array of struct page *.
* The array can be shorter than len >> PAGE_SHIFT if it's null-terminated.
* operations that could ever happen on a certain mm. This includes
* vmtruncate, try_to_unmap, and all page faults.
*
- * The caller must take the mmap_sem in write mode before calling
+ * The caller must take the mmap_lock in write mode before calling
* mm_take_all_locks(). The caller isn't allowed to release the
- * mmap_sem until mm_drop_all_locks() returns.
+ * mmap_lock until mm_drop_all_locks() returns.
*
- * mmap_sem in write mode is required in order to block all operations
+ * mmap_lock in write mode is required in order to block all operations
* that could modify pagetables and free pages without need of
* altering the vma layout. It's also needed in write mode to avoid new
* anon_vmas to be associated with existing vmas.
}
/*
- * The mmap_sem cannot be released by the caller until
+ * The mmap_lock cannot be released by the caller until
* mm_drop_all_locks() returns.
*/
void mm_drop_all_locks(struct mm_struct *mm)
projects / linux-2.6-microblaze.git / blobdiff