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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132/* SPDX-License-Identifier: GPL-2.0 */#ifndef __VDSO_PAGE_H#define __VDSO_PAGE_H
#include <uapi/linux/const.h>
/* * PAGE_SHIFT determines the page size. * * Note: This definition is required because PAGE_SHIFT is used * in several places throughout the codebase. */#define PAGE_SHIFT CONFIG_PAGE_SHIFT
#define PAGE_SIZE (_AC(1,UL) << CONFIG_PAGE_SHIFT)
#if !defined(CONFIG_64BIT)/* * Applies only to 32-bit architectures. * * Subtle: (1 << CONFIG_PAGE_SHIFT) is an int, not an unsigned long. * So if we assign PAGE_MASK to a larger type it gets extended the * way we want (i.e. with 1s in the high bits) while masking a * 64-bit value such as phys_addr_t. */#define PAGE_MASK (~((1 << CONFIG_PAGE_SHIFT) - 1))#else#define PAGE_MASK (~(PAGE_SIZE - 1))#endif
#endif /* __VDSO_PAGE_H */