linux-kernel - [PATCH 1/1] mm: vmalloc: Fix a warning in the crash_save_vmcoreinfo

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Date: Thu, 11 Jan 2024 20:23:29 +0100
From: "Uladzislau Rezki (Sony)" <urezki@...il.com>
To: linux-mm@...ck.org,
	Andrew Morton <akpm@...ux-foundation.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
	Baoquan He <bhe@...hat.com>,
	Lorenzo Stoakes <lstoakes@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	Matthew Wilcox <willy@...radead.org>,
	"Liam R . Howlett" <Liam.Howlett@...cle.com>,
	Dave Chinner <david@...morbit.com>,
	Uladzislau Rezki <urezki@...il.com>,
	Oleksiy Avramchenko <oleksiy.avramchenko@...y.com>,
	kernel test robot <lkp@...el.com>
Subject: [PATCH 1/1] mm: vmalloc: Fix a warning in the crash_save_vmcoreinfo_init()

The vmcoreinfo_append_str() function expects "long unsigned int"
type as a second argument(0x%lx) to print a beginning of vmalloc
start address which is defined as a VMALLOC_START macro.

For some architectures it can be considered as "int" type, for
example m68 generates a compile warning message. To fix it cast
a second argument to "unsigned long".

Fixes: 9bdb180b2d ("mm/vmalloc: remove vmap_area_list")
Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202401120218.y469Puyf-lkp@intel.com/
Signed-off-by: Uladzislau Rezki (Sony) <urezki@...il.com>
---
 kernel/crash_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/crash_core.c b/kernel/crash_core.c
index b60de490c1fc..49b31e59d3cc 100644
--- a/kernel/crash_core.c
+++ b/kernel/crash_core.c
@@ -748,7 +748,7 @@ static int __init crash_save_vmcoreinfo_init(void)
 	VMCOREINFO_SYMBOL_ARRAY(swapper_pg_dir);
 #endif
 	VMCOREINFO_SYMBOL(_stext);
-	vmcoreinfo_append_str("NUMBER(VMALLOC_START)=0x%lx\n", VMALLOC_START);
+	vmcoreinfo_append_str("NUMBER(VMALLOC_START)=0x%lx\n", (unsigned long) VMALLOC_START);
 
 #ifndef CONFIG_NUMA
 	VMCOREINFO_SYMBOL(mem_map);
-- 
2.39.2