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vdso: Introduce vdso/align.h

The vDSO implementation can only include headers from the vdso/
namespace. To enable the usage of the ALIGN() macro from the vDSO, move
linux/align.h to vdso/align.h wholly.
As the only dependency linux/const.h is only a wrapper around
vdso/const.h anyways adapt that dependency.

Also provide a compatibility wrapper linux/align.h.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250204-vdso-store-rng-v3-3-13a4669dfc8c@linutronix.de

authored by

Thomas Weißschuh and committed by
Thomas Gleixner 5b47aba8 30533a55

+16 -9
+1 -9
include/linux/align.h
··· 2 2 #ifndef _LINUX_ALIGN_H 3 3 #define _LINUX_ALIGN_H 4 4 5 - #include <linux/const.h> 6 - 7 - /* @a is a power of 2 value */ 8 - #define ALIGN(x, a) __ALIGN_KERNEL((x), (a)) 9 - #define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a)) 10 - #define __ALIGN_MASK(x, mask) __ALIGN_KERNEL_MASK((x), (mask)) 11 - #define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a))) 12 - #define PTR_ALIGN_DOWN(p, a) ((typeof(p))ALIGN_DOWN((unsigned long)(p), (a))) 13 - #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) 5 + #include <vdso/align.h> 14 6 15 7 #endif /* _LINUX_ALIGN_H */
+15
include/vdso/align.h
··· 1 + /* SPDX-License-Identifier: GPL-2.0 */ 2 + #ifndef __VDSO_ALIGN_H 3 + #define __VDSO_ALIGN_H 4 + 5 + #include <vdso/const.h> 6 + 7 + /* @a is a power of 2 value */ 8 + #define ALIGN(x, a) __ALIGN_KERNEL((x), (a)) 9 + #define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a)) 10 + #define __ALIGN_MASK(x, mask) __ALIGN_KERNEL_MASK((x), (mask)) 11 + #define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a))) 12 + #define PTR_ALIGN_DOWN(p, a) ((typeof(p))ALIGN_DOWN((unsigned long)(p), (a))) 13 + #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) 14 + 15 + #endif /* __VDSO_ALIGN_H */