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| author | Arnd Bergmann <arnd@arndb.de> | 2022-02-11 23:42:45 +0300 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2022-02-25 11:36:06 +0300 |
| commit | 967747bbc084b93b54e66f9047d342232314cd25 (patch) | |
| tree | 816678a5afa21612d3d420c2cd6fc61abc64cda1 /include/asm-generic/uaccess.h | |
| parent | e5ef21d139957b8d064fefb7db42d1525605dd98 (diff) | |
| download | linux-967747bbc084b93b54e66f9047d342232314cd25.tar.xz | |
uaccess: remove CONFIG_SET_FS
There are no remaining callers of set_fs(), so CONFIG_SET_FS
can be removed globally, along with the thread_info field and
any references to it.
This turns access_ok() into a cheaper check against TASK_SIZE_MAX.
As CONFIG_SET_FS is now gone, drop all remaining references to
set_fs()/get_fs(), mm_segment_t, user_addr_max() and uaccess_kernel().
Acked-by: Sam Ravnborg <sam@ravnborg.org> # for sparc32 changes
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Tested-by: Sergey Matyukevich <sergey.matyukevich@synopsys.com> # for arc changes
Acked-by: Stafford Horne <shorne@gmail.com> # [openrisc, asm-generic]
Acked-by: Dinh Nguyen <dinguyen@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include/asm-generic/uaccess.h')
| -rw-r--r-- | include/asm-generic/uaccess.h | 25 |
1 files changed, 1 insertions, 24 deletions
diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h index ebc685dc8d74..a5be9e61a2a2 100644 --- a/include/asm-generic/uaccess.h +++ b/include/asm-generic/uaccess.h @@ -8,6 +8,7 @@ * address space, e.g. all NOMMU machines. */ #include <linux/string.h> +#include <asm-generic/access_ok.h> #ifdef CONFIG_UACCESS_MEMCPY #include <asm/unaligned.h> @@ -94,30 +95,6 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long n) #define INLINE_COPY_TO_USER #endif /* CONFIG_UACCESS_MEMCPY */ -#ifdef CONFIG_SET_FS -#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) - -#ifndef KERNEL_DS -#define KERNEL_DS MAKE_MM_SEG(~0UL) -#endif - -#ifndef USER_DS -#define USER_DS MAKE_MM_SEG(TASK_SIZE - 1) -#endif - -#ifndef get_fs -#define get_fs() (current_thread_info()->addr_limit) - -static inline void set_fs(mm_segment_t fs) -{ - current_thread_info()->addr_limit = fs; -} -#endif - -#endif /* CONFIG_SET_FS */ - -#include <asm-generic/access_ok.h> - /* * These are the main single-value transfer routines. They automatically * use the right size if we just have the right pointer type. |