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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef __ASM_CSKY_VDSO_H
- #define __ASM_CSKY_VDSO_H
- #include <linux/types.h>
- #ifndef GENERIC_TIME_VSYSCALL
- struct vdso_data {
- };
- #endif
- /*
- * The VDSO symbols are mapped into Linux so we can just use regular symbol
- * addressing to get their offsets in userspace. The symbols are mapped at an
- * offset of 0, but since the linker must support setting weak undefined
- * symbols to the absolute address 0 it also happens to support other low
- * addresses even when the code model suggests those low addresses would not
- * otherwise be available.
- */
- #define VDSO_SYMBOL(base, name) \
- ({ \
- extern const char __vdso_##name[]; \
- (void __user *)((unsigned long)(base) + __vdso_##name); \
- })
- #endif /* __ASM_CSKY_VDSO_H */
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