mm/page_alloc: fix build with CONFIG_UNACCEPTED_MEMORY=n

When has_unaccepted_memory() is unused, it prevents kernel builds
with clang, `make W=1` and CONFIG_WERROR=y:

mm/page_alloc.c:7036:20: error: unused function 'has_unaccepted_memory' [-Werror,-Wunused-function]
7036 | static inline bool has_unaccepted_memory(void)
|                    ^~~~~~~~~~~~~~~~~~~~~

Fix it by removeing the CONFIG_UNACCEPTED_MEMORY=n stub.

Link: https://lkml.kernel.org/r/20240905142220.49d93337a0abce5690e515d9@linux-foundation.org
Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Closes: https://lkml.kernel.org/r/20240905171553.275054-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index a6adc8f4b7c09ef784f46f29125e570ed8c844e5..74f13f676985af9c0b87c2d741b859785049c7a2 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -287,7 +287,6 @@ EXPORT_SYMBOL(nr_online_nodes);
 
 static bool page_contains_unaccepted(struct page *page, unsigned int order);
 static bool cond_accept_memory(struct zone *zone, unsigned int order);
-static inline bool has_unaccepted_memory(void);
 static bool __free_unaccepted(struct page *page);
 
 int page_group_by_mobility_disabled __read_mostly;
@@ -7061,6 +7060,11 @@ static bool try_to_accept_memory_one(struct zone *zone)
        return true;
 }
 
+static inline bool has_unaccepted_memory(void)
+{
+       return static_branch_unlikely(&zones_with_unaccepted_pages);
+}
+
 static bool cond_accept_memory(struct zone *zone, unsigned int order)
 {
        long to_accept;
@@ -7088,11 +7092,6 @@ static bool cond_accept_memory(struct zone *zone, unsigned int order)
        return ret;
 }
 
-static inline bool has_unaccepted_memory(void)
-{
-       return static_branch_unlikely(&zones_with_unaccepted_pages);
-}
-
 static bool __free_unaccepted(struct page *page)
 {
        struct zone *zone = page_zone(page);
@@ -7128,11 +7127,6 @@ static bool cond_accept_memory(struct zone *zone, unsigned int order)
        return false;
 }
 
-static inline bool has_unaccepted_memory(void)
-{
-       return false;
-}
-
 static bool __free_unaccepted(struct page *page)
 {
        BUILD_BUG();