From c64a15a5956a6dbcd4f10dc78ff97f7aa3edc736 Mon Sep 17 00:00:00 2001
From: Kalesh Singh <kaleshsingh@google.com>
Date: Wed, 31 Jul 2024 20:45:07 -0700
Subject: [PATCH] ANDROID: 16K: Introduce __MAX_PAGE_SIZE macros

For some cases, such as the vDSO layout, the page alignment needs
to be know at build time.

Introduce __MAX_PAGE_SIZE and friends for use in such scenarios.

Bug: 383389337
Bug: 356729201
Change-Id: I216568384efb147c868278318718703099e12e1c
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
---
 include/linux/page_size_compat.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/page_size_compat.h b/include/linux/page_size_compat.h
index 944a708fc0ec..7c6f5bd05b7f 100644
--- a/include/linux/page_size_compat.h
+++ b/include/linux/page_size_compat.h
@@ -22,6 +22,12 @@
 
 #include <asm/page.h>
 
+#define __MAX_PAGE_SHIFT		14
+#define __MAX_PAGE_SIZE		(_AC(1,UL) << __MAX_PAGE_SHIFT)
+#define __MAX_PAGE_MASK		(~(__MAX_PAGE_SIZE-1))
+
+#ifndef __ASSEMBLY__
+
 #include <linux/align.h>
 #include <linux/jump_label.h>
 #include <linux/mman.h>
@@ -143,4 +149,6 @@ static __always_inline void __filemap_fixup(unsigned long addr, unsigned long pr
 		___filemap_fixup(addr, prot, old_len, new_len);
 }
 
+#endif /* !__ASSEMBLY__ */
+
 #endif /* __LINUX_PAGE_SIZE_COMPAT_H */