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Diffstat (limited to 'arch/arm/mm/init.c')
-rw-r--r--arch/arm/mm/init.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 1565d6b67163..0fe4a7025e46 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -192,6 +192,11 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max_low,
#ifdef CONFIG_HAVE_ARCH_PFN_VALID
int pfn_valid(unsigned long pfn)
{
+ phys_addr_t addr = __pfn_to_phys(pfn);
+
+ if (__phys_to_pfn(addr) != pfn)
+ return 0;
+
return memblock_is_map_memory(__pfn_to_phys(pfn));
}
EXPORT_SYMBOL(pfn_valid);
@@ -698,7 +703,8 @@ static void update_sections_early(struct section_perm perms[], int n)
if (t->flags & PF_KTHREAD)
continue;
for_each_thread(t, s)
- set_section_perms(perms, n, true, s->mm);
+ if (s->mm)
+ set_section_perms(perms, n, true, s->mm);
}
read_unlock(&tasklist_lock);
set_section_perms(perms, n, true, current->active_mm);