[PATCH v2] Avoid nested function definition

[Peter Foley]

Fixes below error with clang:
../drivers/md/bcache/sysfs.c:759:3: error: function definition is not allowed 
here
                {       return *((uint16_t *) r) - *((uint16_t *) l); }
                ^
../drivers/md/bcache/sysfs.c:789:32: error: use of undeclared identifier 'cmp'
                sort(p, n, sizeof(uint16_t), cmp, NULL);
                                             ^
2 errors generated.

v2:
rename function to __bch_cache_cmp

Signed-off-by: Peter Foley <pefol...@pefoley.com>
---
 drivers/md/bcache/sysfs.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index b3ff57d61dde..8f12089a69e7 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -731,6 +731,11 @@ static struct attribute *bch_cache_set_internal_files[] = {
 };
 KTYPE(bch_cache_set_internal);
 
+static int __bch_cache_cmp(const void *l, const void *r)
+{
+       return *((uint16_t *)r) - *((uint16_t *)l);
+}
+
 SHOW(__bch_cache)
 {
        struct cache *ca = container_of(kobj, struct cache, kobj);
@@ -755,9 +760,6 @@ SHOW(__bch_cache)
                                               CACHE_REPLACEMENT(&ca->sb));
 
        if (attr == &sysfs_priority_stats) {
-               int cmp(const void *l, const void *r)
-               {       return *((uint16_t *) r) - *((uint16_t *) l); }
-
                struct bucket *b;
                size_t n = ca->sb.nbuckets, i;
                size_t unused = 0, available = 0, dirty = 0, meta = 0;
@@ -786,7 +788,7 @@ SHOW(__bch_cache)
                        p[i] = ca->buckets[i].prio;
                mutex_unlock(&ca->set->bucket_lock);
 
-               sort(p, n, sizeof(uint16_t), cmp, NULL);
+               sort(p, n, sizeof(uint16_t), __bch_cache_cmp, NULL);
 
                while (n &&
                       !cached[n - 1])
-- 
2.11.0.rc2