Outline and export free_reserved_page() because modules use it and it in turn uses page_ext_{get|put} which should not be exported. The same result could be obtained by outlining {get|put}_page_tag_ref() but that would have higher performance impact as these functions are used in more performance critical paths.

Fixes: dcfe378c81f7 ("lib: introduce support for page allocation tagging") Reported-by: kernel test robot lkp@intel.com Closes: https://lore.kernel.org/oe-kbuild-all/202407080044.DWMC9N9I-lkp@intel.com/ Suggested-by: Christoph Hellwig hch@infradead.org Suggested-by: Vlastimil Babka vbabka@suse.cz Signed-off-by: Suren Baghdasaryan surenb@google.com Acked-by: Vlastimil Babka vbabka@suse.cz Cc: stable@vger.kernel.org # v6.10 --- Changes since v2 [1] - Dropped the first unnecessary patch from the patchset, per Vlastimil Babka - Added Acked-by, per Vlastimil Babka - CC'ed stable@, per Vlastimil Babka

[1] https://lore.kernel.org/all/20240717181239.2510054-1-surenb@google.com/

include/linux/mm.h | 16 +--------------- mm/page_alloc.c | 17 +++++++++++++++++ 2 files changed, 18 insertions(+), 15 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h index eb7c96d24ac0..b58bad248eef 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3177,21 +3177,7 @@ extern void reserve_bootmem_region(phys_addr_t start, phys_addr_t end, int nid);

/* Free the reserved page into the buddy system, so it gets managed. */ -static inline void free_reserved_page(struct page *page) -{ - if (mem_alloc_profiling_enabled()) { - union codetag_ref *ref = get_page_tag_ref(page); - - if (ref) { - set_codetag_empty(ref); - put_page_tag_ref(ref); - } - } - ClearPageReserved(page); - init_page_count(page); - __free_page(page); - adjust_managed_page_count(page, 1); -} +void free_reserved_page(struct page *page); #define free_highmem_page(page) free_reserved_page(page)

static inline void mark_page_reserved(struct page *page) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 9ecf99190ea2..7d2fa9f5e750 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5805,6 +5805,23 @@ unsigned long free_reserved_area(void *start, void *end, int poison, const char return pages; }

+void free_reserved_page(struct page *page) +{ + if (mem_alloc_profiling_enabled()) { + union codetag_ref *ref = get_page_tag_ref(page); + + if (ref) { + set_codetag_empty(ref); + put_page_tag_ref(ref); + } + } + ClearPageReserved(page); + init_page_count(page); + __free_page(page); + adjust_managed_page_count(page, 1); +} +EXPORT_SYMBOL(free_reserved_page); + static int page_alloc_cpu_dead(unsigned int cpu) { struct zone *zone;

base-commit: e2f710f97f3544df08ebe608c8157536e0ffb494