linux-kernel - [PATCH v4 13/15] linux/mm.h: move is_vmalloc_addr() to mm/vmalloc

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Date: Tue, 12 Mar 2024 10:41:31 +0100
From: Max Kellermann <max.kellermann@...os.com>
To: akpm@...ux-foundation.org,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Cc: willy@...radead.org,
	sfr@...b.auug.org.au,
	Max Kellermann <max.kellermann@...os.com>
Subject: [PATCH v4 13/15] linux/mm.h: move is_vmalloc_addr() to mm/vmalloc_addr.h

This is needed to eliminate linux/dma-mapping.h's dependency on
linux/mm.h.

Signed-off-by: Max Kellermann <max.kellermann@...os.com>
---
 include/linux/mm.h              | 25 +------------------------
 include/linux/mm/vmalloc_addr.h | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 24 deletions(-)
 create mode 100644 include/linux/mm/vmalloc_addr.h

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 07262ae43c5d..80fc7df2856a 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -9,6 +9,7 @@
 #include <linux/mm/page_address.h>
 #include <linux/mm/page_section.h>
 #include <linux/mm/pfmemalloc.h>
+#include <linux/mm/vmalloc_addr.h>
 #include <linux/errno.h>
 #include <linux/mmdebug.h>
 #include <linux/gfp.h>
@@ -1086,30 +1087,6 @@ enum {
 int region_intersects(resource_size_t offset, size_t size, unsigned long flags,
 		      unsigned long desc);
 
-/* Support for virtually mapped pages */
-struct page *vmalloc_to_page(const void *addr);
-unsigned long vmalloc_to_pfn(const void *addr);
-
-/*
- * Determine if an address is within the vmalloc range
- *
- * On nommu, vmalloc/vfree wrap through kmalloc/kfree directly, so there
- * is no special casing required.
- */
-#ifdef CONFIG_MMU
-extern bool is_vmalloc_addr(const void *x);
-extern int is_vmalloc_or_module_addr(const void *x);
-#else
-static inline bool is_vmalloc_addr(const void *x)
-{
-	return false;
-}
-static inline int is_vmalloc_or_module_addr(const void *x)
-{
-	return 0;
-}
-#endif
-
 /*
  * How many times the entire folio is mapped as a single unit (eg by a
  * PMD or PUD entry).  This is probably not what you want, except for
diff --git a/include/linux/mm/vmalloc_addr.h b/include/linux/mm/vmalloc_addr.h
new file mode 100644
index 000000000000..86ad2dc94960
--- /dev/null
+++ b/include/linux/mm/vmalloc_addr.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_MM_VMALLOC_ADDR_H
+#define _LINUX_MM_VMALLOC_ADDR_H
+
+#include <linux/types.h> // for bool
+
+struct page;
+
+/* Support for virtually mapped pages */
+struct page *vmalloc_to_page(const void *addr);
+unsigned long vmalloc_to_pfn(const void *addr);
+
+/*
+ * Determine if an address is within the vmalloc range
+ *
+ * On nommu, vmalloc/vfree wrap through kmalloc/kfree directly, so there
+ * is no special casing required.
+ */
+#ifdef CONFIG_MMU
+extern bool is_vmalloc_addr(const void *x);
+extern int is_vmalloc_or_module_addr(const void *x);
+#else
+static inline bool is_vmalloc_addr(const void *x)
+{
+	return false;
+}
+static inline int is_vmalloc_or_module_addr(const void *x)
+{
+	return 0;
+}
+#endif
+
+#endif /* _LINUX_MM_VMALLOC_ADDR_H */
-- 
2.39.2