From aedf95ea0583676cd7bfa395681ad744791a433e Mon Sep 17 00:00:00 2001
From: Catalin Marinas <catalin.marinas@arm.com>
Date: Fri, 6 Jun 2014 14:38:20 -0700
Subject: [PATCH] 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>
---
mm/memblock.c | 10 ++++++++--
mm/nobootmem.c | 2 --
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/mm/memblock.c b/mm/memblock.c
index 0aa0d2b076244..6d2f219a48b01 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;
}
diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index 04a9d94333a5c..7ed58602e71b1 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -197,7 +197,6 @@ unsigned long __init free_all_bootmem(void)
void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
unsigned long size)
{
- kmemleak_free_part(__va(physaddr), size);
memblock_free(physaddr, size);
}
@@ -212,7 +211,6 @@ void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
*/
void __init free_bootmem(unsigned long addr, unsigned long size)
{
- kmemleak_free_part(__va(addr), size);
memblock_free(addr, size);
}
--
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