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authorChristoph Hellwig <hch@lst.de>2017-12-29 08:54:06 +0100
committerDan Williams <dan.j.williams@intel.com>2018-01-08 11:46:23 -0800
commite697c5b90e97792187e45f8d78fb2bfa62eb0496 (patch)
tree04974afac6c78d6b02de1701029c3c8e13d7013d /kernel/memremap.c
parente8d5134833006a46fcbefc5f4a84d0b62bd520e7 (diff)
downloadlinux-e697c5b90e97792187e45f8d78fb2bfa62eb0496.tar.bz2
memremap: merge find_dev_pagemap into get_dev_pagemap
There is only one caller of the trivial function find_dev_pagemap left, so just merge it into the caller. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'kernel/memremap.c')
-rw-r--r--kernel/memremap.c10
1 files changed, 1 insertions, 9 deletions
diff --git a/kernel/memremap.c b/kernel/memremap.c
index a9a948cd3d7f..ada31b0d76d4 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -306,14 +306,6 @@ static void devm_memremap_pages_release(void *data)
"%s: failed to free all reserved pages\n", __func__);
}
-/* assumes rcu_read_lock() held at entry */
-static struct dev_pagemap *find_dev_pagemap(resource_size_t phys)
-{
- WARN_ON_ONCE(!rcu_read_lock_held());
-
- return radix_tree_lookup(&pgmap_radix, PHYS_PFN(phys));
-}
-
/**
* devm_memremap_pages - remap and provide memmap backing for the given resource
* @dev: hosting device for @res
@@ -466,7 +458,7 @@ struct dev_pagemap *get_dev_pagemap(unsigned long pfn,
/* fall back to slow path lookup */
rcu_read_lock();
- pgmap = find_dev_pagemap(phys);
+ pgmap = radix_tree_lookup(&pgmap_radix, PHYS_PFN(phys));
if (pgmap && !percpu_ref_tryget_live(pgmap->ref))
pgmap = NULL;
rcu_read_unlock();