# HG changeset patch
# User Maxim Dounin <mdounin@mdounin.ru>
# Date 1549997475 -10800
# Node ID d97d09ef3afe1adadecc46db230dbabbc8311f8f
# Parent  608810849b6dbbe855ca8a80c4769f7ee45bc490
Slab: removed redundant page calculation (ticket #1721).

diff --git a/src/core/ngx_slab.c b/src/core/ngx_slab.c
--- a/src/core/ngx_slab.c
+++ b/src/core/ngx_slab.c
@@ -635,10 +635,9 @@ ngx_slab_free_locked(ngx_slab_pool_t *po
             goto fail;
         }
 
-        n = ((u_char *) p - pool->start) >> ngx_pagesize_shift;
         size = slab & ~NGX_SLAB_PAGE_START;
 
-        ngx_slab_free_pages(pool, &pool->pages[n], size);
+        ngx_slab_free_pages(pool, page, size);
 
         ngx_slab_junk(p, size << ngx_pagesize_shift);