Re: [PATCH 2/2] sh: initialize max_mapnr

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On 14.02.23 15:07, Mike Rapoport wrote:
From: "Mike Rapoport (IBM)" <rppt@xxxxxxxxxx>

sh never initializes max_mapnr which is used by the generic
implementation of pfn_valid().

Initialize max_mapnr with set_max_mapnr() in sh::paging_init().

Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Fixes: e5080a967785 ("mm, arch: add generic implementation of pfn_valid() for FLATMEM")
Signed-off-by: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
---
  arch/sh/mm/init.c | 1 +
  1 file changed, 1 insertion(+)

diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 506784702430..bf1b54055316 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -301,6 +301,7 @@ void __init paging_init(void)
  	 */
  	max_low_pfn = max_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT;
  	min_low_pfn = __MEMORY_START >> PAGE_SHIFT;
+	set_max_mapnr(max_low_pfn - min_low_pfn);
nodes_clear(node_online_map);

Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>

--
Thanks,

David / dhildenb





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