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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 /arch/nds32/include | |
| 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 'arch/nds32/include')
| -rw-r--r-- | arch/nds32/include/asm/thread_info.h | 4 | ||||
| -rw-r--r-- | arch/nds32/include/asm/uaccess.h | 15 |
2 files changed, 1 insertions, 18 deletions
diff --git a/arch/nds32/include/asm/thread_info.h b/arch/nds32/include/asm/thread_info.h index d3967ad184f0..bd8f81cf2ce5 100644 --- a/arch/nds32/include/asm/thread_info.h +++ b/arch/nds32/include/asm/thread_info.h @@ -16,8 +16,6 @@ struct task_struct; #include <asm/ptrace.h> #include <asm/types.h> -typedef unsigned long mm_segment_t; - /* * low level task data that entry.S needs immediate access to. * __switch_to() assumes cpu_context follows immediately after cpu_domain. @@ -25,12 +23,10 @@ typedef unsigned long mm_segment_t; struct thread_info { unsigned long flags; /* low level flags */ __s32 preempt_count; /* 0 => preemptable, <0 => bug */ - mm_segment_t addr_limit; /* address limit */ }; #define INIT_THREAD_INFO(tsk) \ { \ .preempt_count = INIT_PREEMPT_COUNT, \ - .addr_limit = KERNEL_DS, \ } #define thread_saved_pc(tsk) ((unsigned long)(tsk->thread.cpu_context.pc)) #define thread_saved_fp(tsk) ((unsigned long)(tsk->thread.cpu_context.fp)) diff --git a/arch/nds32/include/asm/uaccess.h b/arch/nds32/include/asm/uaccess.h index 832d642a4068..377548d4451a 100644 --- a/arch/nds32/include/asm/uaccess.h +++ b/arch/nds32/include/asm/uaccess.h @@ -11,6 +11,7 @@ #include <asm/errno.h> #include <asm/memory.h> #include <asm/types.h> +#include <asm-generic/access_ok.h> #define __asmeq(x, y) ".ifnc " x "," y " ; .err ; .endif\n\t" @@ -33,20 +34,6 @@ struct exception_table_entry { extern int fixup_exception(struct pt_regs *regs); -#define KERNEL_DS ((mm_segment_t) { ~0UL }) -#define USER_DS ((mm_segment_t) {TASK_SIZE - 1}) - -#define get_fs() (current_thread_info()->addr_limit) -#define user_addr_max get_fs -#define uaccess_kernel() (get_fs() == KERNEL_DS) - -static inline void set_fs(mm_segment_t fs) -{ - current_thread_info()->addr_limit = fs; -} - -#include <asm-generic/access_ok.h> - /* * Single-value transfer routines. They automatically use the right * size if we just have the right pointer type. Note that the functions |