Let's print a warning similar to in arch_add_linear_mapping() instead of WARN_ON_ONCE() and eventually crashing the kernel.
Cc: Michael Ellerman <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Rashmica Gupta <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Oscar Salvador <[email protected]> Cc: Wei Yang <[email protected]> Signed-off-by: David Hildenbrand <[email protected]> --- arch/powerpc/mm/mem.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 8a86d81f8df0..685028451dd2 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -145,7 +145,9 @@ void __ref arch_remove_linear_mapping(u64 start, u64 size) flush_dcache_range_chunked(start, start + size, FLUSH_CHUNK_SIZE); ret = remove_section_mapping(start, start + size); - WARN_ON_ONCE(ret); + if (ret) + pr_warn("Unable to remove linear mapping for 0x%llx..0x%llx: %d\n", + start, start + size, ret); /* Ensure all vmalloc mappings are flushed in case they also * hit that section of memory -- 2.26.2
