linux-kernel - [PATCH] bootmem: add bootmem

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Message-Id: <20241015143802.577613-1-arnd@kernel.org>
Date: Tue, 15 Oct 2024 14:36:06 +0000
From: Arnd Bergmann <arnd@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>,
	"Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc: Arnd Bergmann <arnd@...db.de>,
	Catalin Marinas <catalin.marinas@....com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] bootmem: add bootmem_type stub function

From: Arnd Bergmann <arnd@...db.de>

When CONFIG_HAVE_BOOTMEM_INFO_NODE is disabled, the bootmem_type()
and bootmem_info() functions are not defined:

mm/sparse.c: In function 'free_map_bootmem':
mm/sparse.c:730:24: error: implicit declaration of function 'bootmem_type' [-Wimplicit-function-declaration]
  730 |                 type = bootmem_type(page);
      |                        ^~~~~~~~~~~~

mm/sparse.c: In function 'free_map_bootmem':
mm/sparse.c:735:39: error: implicit declaration of function 'bootmem_info'; did you mean 'bootmem_type'? [-Wimplicit-function-declaration]

Add trivial stub functions to make it build.

Fixes: 43d552a255a6 ("bootmem: stop using page->index")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
No idea if this is what we want, or if the return values make
any sense. Just treat this as a bug report.
---
 include/linux/bootmem_info.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/bootmem_info.h b/include/linux/bootmem_info.h
index e2fe5de93dcc..d8a8d245824a 100644
--- a/include/linux/bootmem_info.h
+++ b/include/linux/bootmem_info.h
@@ -62,6 +62,16 @@ static inline void put_page_bootmem(struct page *page)
 {
 }
 
+static inline enum bootmem_type bootmem_type(const struct page *page)
+{
+	return SECTION_INFO;
+}
+
+static inline unsigned long bootmem_info(const struct page *page)
+{
+	return 0;
+}
+
 static inline void get_page_bootmem(unsigned long info, struct page *page,
 				    enum bootmem_type type)
 {
-- 
2.39.5