[PATCH v2 3/3] mm: vmalloc: Replace BUG_ON() by WARN_ON_ONCE()

[Uladzislau Rezki (Sony)]

Currently a vm_unmap_ram() functions triggers a BUG() if an area
is not found. Replace it by the WARN_ON_ONCE() error message and
keep machine alive instead of stopping it.

The worst case is a memory leaking.

Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
---
 mm/vmalloc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 17e688cc7357..221d8950e13c 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2252,7 +2252,9 @@ void vm_unmap_ram(const void *mem, unsigned int count)
 	}
 
 	va = find_unlink_vmap_area(addr);
-	BUG_ON(!va);
+	if (WARN_ON_ONCE(!va))
+		return;
+
 	debug_check_no_locks_freed((void *)va->va_start,
 				    (va->va_end - va->va_start));
 	free_unmap_vmap_area(va);
-- 
2.30.2