kmemleak: Add callbacks to the bootmem allocator

This patch adds kmemleak_alloc/free callbacks to the bootmem allocator. This would allow scanning of such blocks and help avoiding a whole class of false positives and more kmemleak annotations. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org>

kmemleak: Add callbacks to the bootmem allocator
This patch adds kmemleak_alloc/free callbacks to the bootmem allocator. This would allow scanning of such blocks and help avoiding a whole class of false positives and more kmemleak annotations. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org>
Catalin Marinas
1 parent 53238a60dd
Showing 1 changed file with 6 additions and 0 deletions Side-by-side Diff
mm/bootmem.c
@@ -12,6 +12,7 @@
 #include <linux/pfn.h>
 #include <linux/bootmem.h>
 #include <linux/module.h>
+#include <linux/kmemleak.h>
  
 #include <asm/bug.h>
 #include <asm/io.h>
@@ -335,6 +336,8 @@
 {
 	unsigned long start, end;
  
+	kmemleak_free_part(__va(physaddr), size);
+
 	start = PFN_UP(physaddr);
 	end = PFN_DOWN(physaddr + size);
  
@@ -354,6 +357,8 @@
 {
 	unsigned long start, end;
  
+	kmemleak_free_part(__va(addr), size);
+
 	start = PFN_UP(addr);
 	end = PFN_DOWN(addr + size);
  
@@ -516,6 +521,7 @@
 		region = phys_to_virt(PFN_PHYS(bdata->node_min_pfn) +
 				start_off);
 		memset(region, 0, size);
+		kmemleak_alloc(region, size, 1, 0);
 		return region;
 	}
...	...	@@ -12,6 +12,7 @@
12	12	#include <linux/pfn.h>
13	13	#include <linux/bootmem.h>
14	14	#include <linux/module.h>
	15	+#include <linux/kmemleak.h>
15	16
16	17	#include <asm/bug.h>
17	18	#include <asm/io.h>
...	...	@@ -335,6 +336,8 @@
335	336	{
336	337	unsigned long start, end;
337	338
	339	+ kmemleak_free_part(__va(physaddr), size);
	340	+
338	341	start = PFN_UP(physaddr);
339	342	end = PFN_DOWN(physaddr + size);
340	343
...	...	@@ -354,6 +357,8 @@
354	357	{
355	358	unsigned long start, end;
356	359
	360	+ kmemleak_free_part(__va(addr), size);
	361	+
357	362	start = PFN_UP(addr);
358	363	end = PFN_DOWN(addr + size);
359	364
...	...	@@ -516,6 +521,7 @@
516	521	region = phys_to_virt(PFN_PHYS(bdata->node_min_pfn) +
517	522	start_off);
518	523	memset(region, 0, size);
	524	+ kmemleak_alloc(region, size, 1, 0);
519	525	return region;
520	526	}
521	527