linux-kernel - [PATCH] mm/sparse: fix "unused function 'pgdat_to

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Message-Id: <20230121101151.1703292-1-rppt@kernel.org>
Date:   Sat, 21 Jan 2023 12:11:51 +0200
From:   Mike Rapoport <rppt@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Miles Chen <miles.chen@...iatek.com>,
        kernel test robot <lkp@...el.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
        oe-kbuild-all@...ts.linux.dev, Mike Rapoport <rppt@...nel.org>
Subject: [PATCH] mm/sparse: fix "unused function 'pgdat_to_phys'" warning

W=1 build with clangs complains:

mm/sparse.c:347:27: warning: unused function 'pgdat_to_phys' [-Wunused-function]
static inline phys_addr_t pgdat_to_phys(struct pglist_data *pgdat)
                             ^
1 warning generated.

pgdat_to_phys() is only used by functions defined when
CONFIG_MEMORY_HOTREMOVE=y.

Move pgdat_to_phys() under #ifdef CONFIG_MEMORY_HOTREMOVE
to make clang happy.

Reported-by: kernel test robot <lkp@...el.com>
Link: https://lore.kernel.org/all/202301210155.1E5zABb5-lkp@intel.com
Signed-off-by: Mike Rapoport <rppt@...nel.org>
---
 mm/sparse.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/sparse.c b/mm/sparse.c
index 2779b419ef2a..fb7aeb1899a4 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -318,6 +318,7 @@ size_t mem_section_usage_size(void)
 	return sizeof(struct mem_section_usage) + usemap_size();
 }
 
+#ifdef CONFIG_MEMORY_HOTREMOVE
 static inline phys_addr_t pgdat_to_phys(struct pglist_data *pgdat)
 {
 #ifndef CONFIG_NUMA
@@ -328,7 +329,6 @@ static inline phys_addr_t pgdat_to_phys(struct pglist_data *pgdat)
 #endif
 }
 
-#ifdef CONFIG_MEMORY_HOTREMOVE
 static struct mem_section_usage * __init
 sparse_early_usemaps_alloc_pgdat_section(struct pglist_data *pgdat,
 					 unsigned long size)
-- 
2.35.1