diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2022-02-11 21:42:45 +0100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2022-02-25 09:36:06 +0100 |
| commit | 967747bbc084b93b54e66f9047d342232314cd25 (patch) | |
| tree | 816678a5afa21612d3d420c2cd6fc61abc64cda1 /arch/nios2 | |
| parent | e5ef21d139957b8d064fefb7db42d1525605dd98 (diff) | |
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/nios2')
| -rw-r--r-- | arch/nios2/Kconfig | 1 | ||||
| -rw-r--r-- | arch/nios2/include/asm/thread_info.h | 9 | ||||
| -rw-r--r-- | arch/nios2/include/asm/uaccess.h | 12 |
3 files changed, 0 insertions, 22 deletions
diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig index 33fd06f5fa41..4167f1eb4cd8 100644 --- a/arch/nios2/Kconfig +++ b/arch/nios2/Kconfig @@ -24,7 +24,6 @@ config NIOS2 select USB_ARCH_HAS_HCD if USB_SUPPORT select CPU_NO_EFFICIENT_FFS select MMU_GATHER_NO_RANGE if MMU - select SET_FS config GENERIC_CSUM def_bool y diff --git a/arch/nios2/include/asm/thread_info.h b/arch/nios2/include/asm/thread_info.h index 272d2c72a727..bcc0e9915ebd 100644 --- a/arch/nios2/include/asm/thread_info.h +++ b/arch/nios2/include/asm/thread_info.h @@ -26,10 +26,6 @@ #ifndef __ASSEMBLY__ -typedef struct { - unsigned long seg; -} mm_segment_t; - /* * low level task data that entry.S needs immediate access to * - this struct should fit entirely inside of one cache line @@ -42,10 +38,6 @@ struct thread_info { unsigned long flags; /* low level flags */ __u32 cpu; /* current CPU */ int preempt_count; /* 0 => preemptable,<0 => BUG */ - mm_segment_t addr_limit; /* thread address space: - 0-0x7FFFFFFF for user-thead - 0-0xFFFFFFFF for kernel-thread - */ struct pt_regs *regs; }; @@ -60,7 +52,6 @@ struct thread_info { .flags = 0, \ .cpu = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ - .addr_limit = KERNEL_DS, \ } /* how to get the thread information struct from C */ diff --git a/arch/nios2/include/asm/uaccess.h b/arch/nios2/include/asm/uaccess.h index 6664ddc0e8e5..b8299082adbe 100644 --- a/arch/nios2/include/asm/uaccess.h +++ b/arch/nios2/include/asm/uaccess.h @@ -18,18 +18,6 @@ #include <asm/page.h> #include <asm/extable.h> - -/* - * Segment stuff - */ -#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) -#define USER_DS MAKE_MM_SEG(0x80000000UL) -#define KERNEL_DS MAKE_MM_SEG(0) - - -#define get_fs() (current_thread_info()->addr_limit) -#define set_fs(seg) (current_thread_info()->addr_limit = (seg)) - #include <asm-generic/access_ok.h> # define __EX_TABLE_SECTION ".section __ex_table,\"a\"\n" |