X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=mm%2Fnommu.c;h=fd4e8df0f02df979bb2a2de5a891e35f82754a7d;hb=ceeec3dc375e3b0618f16b34efc56fe093918f8b;hp=ce74452c02d945e40e6cdb503499609f24e1cd64;hpb=7ca6448dbfb398bba36eda3c01bc14b86c3675be;p=firefly-linux-kernel-4.4.55.git

diff --git a/mm/nommu.c b/mm/nommu.c
index ce74452c02d9..fd4e8df0f02d 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1167,7 +1167,11 @@ int __vm_enough_memory(long pages, int cap_sys_admin)
 	   leave 3% of the size of this process for other processes */
 	allowed -= current->mm->total_vm / 32;
 
-	if (atomic_read(&vm_committed_space) < allowed)
+	/*
+	 * cast `allowed' as a signed long because vm_committed_space
+	 * sometimes has a negative value
+	 */
+	if (atomic_read(&vm_committed_space) < (long)allowed)
 		return 0;
 
 	vm_unacct_memory(pages);