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| author |   Arnd Bergmann <arnd@arndb.de> | 2019-12-12 18:15:25 +0100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2020-01-03 09:32:51 +0100 |
| commit | 202bf8d7583f2b6e28de2e9edf6fcd7e3667a173 (patch) | |
| tree | acc551431ec00ecd6c4935a7d4a2de51c0cae4c6 /include/linux/compat.h | |
| parent | compat: ARM64: always include asm-generic/compat.h (diff) | |
| download | linux-dev-202bf8d7583f2b6e28de2e9edf6fcd7e3667a173.tar.xz linux-dev-202bf8d7583f2b6e28de2e9edf6fcd7e3667a173.zip | |
compat: provide compat_ptr() on all architectures
In order to avoid needless #ifdef CONFIG_COMPAT checks,
move the compat_ptr() definition to linux/compat.h
where it can be seen by any file regardless of the
architecture.
Only s390 needs a special definition, this can use the
self-#define trick we have elsewhere.
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/compat.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h index 68f79d855c3d..11083d84eb23 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -958,4 +958,22 @@ static inline bool in_compat_syscall(void) { return false; } #endif /* CONFIG_COMPAT */ +/* + * A pointer passed in from user mode. This should not + * be used for syscall parameters, just declare them + * as pointers because the syscall entry code will have + * appropriately converted them already. + */ +#ifndef compat_ptr +static inline void __user *compat_ptr(compat_uptr_t uptr) +{ + return (void __user *)(unsigned long)uptr; +} +#endif + +static inline compat_uptr_t ptr_to_compat(void __user *uptr) +{ + return (u32)(unsigned long)uptr; +} + #endif /* _LINUX_COMPAT_H */ |