mm/memblock.c: call kmemleak directly from memblock_(alloc|free)

Kmemleak could ignore memory blocks allocated via memblock_alloc()
leading to false positives during scanning.  This patch adds the
corresponding callbacks and removes kmemleak_free_* calls in
mm/nobootmem.c to avoid duplication.

The kmemleak_alloc() in mm/nobootmem.c is kept since
__alloc_memory_core_early() does not use memblock_alloc() directly.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 8 insertions, 2 deletions

diff --git a/mm/memblock.c b/mm/memblock.c
index 0aa0d2b07624..6d2f219a48b0 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -691,6 +691,7 @@ int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size)
                      (unsigned long long)base + size - 1,
                      (void *)_RET_IP_);
 
+        kmemleak_free_part(__va(base), size);
         return memblock_remove_range(&memblock.reserved, base, size);
 }
 
@@ -1043,9 +1044,14 @@ static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size,
                 align = SMP_CACHE_BYTES;
 
         found = memblock_find_in_range_node(size, align, start, end, nid);
-        if (found && !memblock_reserve(found, size))
+        if (found && !memblock_reserve(found, size)) {
+                /*
+                 * The min_count is set to 0 so that memblock allocations are
+                 * never reported as leaks.
+                 */
+                kmemleak_alloc(__va(found), size, 0, 0);
                 return found;
-
+        }
         return 0;
 }