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 2026-10-28 10:41:38 -04:00
Code Issues Projects Releases Packages Wiki Activity

radix-tree: delete radix_tree_locate_item()

Browse source 
This rather complicated function can be better implemented as an
iterator.  It has only one caller, so move the functionality to the only
place that needs it.  Update the test suite to follow the same pattern.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Matthew Wilcox <[email protected]>
Acked-by: Konstantin Khlebnikov <[email protected]>
Tested-by: Kirill A. Shutemov <[email protected]>
Cc: Ross Zwisler <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Matthew Wilcox 2016-12-14 15:08:52 -08:00 • committed by Linus Torvalds
commit 478922e2b0
6 changed files with 53 additions and 105 deletions
Download patch file Download diff file Expand all files Collapse all files

26
mm/shmem.c
View file

@ -1049,6 +1049,30 @@ static void shmem_evict_inode(struct inode *inode)
clear_inode(inode);
}
static unsigned long find_swap_entry(struct radix_tree_root *root, void *item)
{
struct radix_tree_iter iter;
void **slot;
unsigned long found = -1;
unsigned int checked = 0;
rcu_read_lock();
radix_tree_for_each_slot(slot, root, &iter, 0) {
if (*slot == item) {
found = iter.index;
break;
}
checked++;
if ((checked % 4096) != 0)
continue;
slot = radix_tree_iter_resume(slot, &iter);
cond_resched_rcu();
}
rcu_read_unlock();
return found;
}
/*
* If swap found in inode, free it and move page from swapcache to filecache.
*/
@ -1062,7 +1086,7 @@ static int shmem_unuse_inode(struct shmem_inode_info *info,
int error = 0;
radswap = swp_to_radix_entry(swap);
index = radix_tree_locate_item(&mapping->page_tree, radswap);
index = find_swap_entry(&mapping->page_tree, radswap);
if (index == -1)
return -EAGAIN; /* tell shmem_unuse we found nothing */