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/openrisc | |
| parent | e5ef21d139957b8d064fefb7db42d1525605dd98 (diff) | |
| download | linux-967747bbc084b93b54e66f9047d342232314cd25.tar.bz2 | |
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/openrisc')
| -rw-r--r-- | arch/openrisc/Kconfig | 1 | ||||
| -rw-r--r-- | arch/openrisc/include/asm/thread_info.h | 7 | ||||
| -rw-r--r-- | arch/openrisc/include/asm/uaccess.h | 23 |
3 files changed, 0 insertions, 31 deletions
diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig index f724b3f1aeed..0d68adf6e02b 100644 --- a/arch/openrisc/Kconfig +++ b/arch/openrisc/Kconfig @@ -36,7 +36,6 @@ config OPENRISC select ARCH_WANT_FRAME_POINTERS select GENERIC_IRQ_MULTI_HANDLER select MMU_GATHER_NO_RANGE if MMU - select SET_FS select TRACE_IRQFLAGS_SUPPORT config CPU_BIG_ENDIAN diff --git a/arch/openrisc/include/asm/thread_info.h b/arch/openrisc/include/asm/thread_info.h index 659834ab87fa..4af3049c34c2 100644 --- a/arch/openrisc/include/asm/thread_info.h +++ b/arch/openrisc/include/asm/thread_info.h @@ -40,18 +40,12 @@ */ #ifndef __ASSEMBLY__ -typedef unsigned long mm_segment_t; - struct thread_info { struct task_struct *task; /* main task structure */ unsigned long flags; /* low level flags */ __u32 cpu; /* current CPU */ __s32 preempt_count; /* 0 => preemptable, <0 => BUG */ - mm_segment_t addr_limit; /* thread address space: - 0-0x7FFFFFFF for user-thead - 0-0xFFFFFFFF for kernel-thread - */ __u8 supervisor_stack[0]; /* saved context data */ @@ -71,7 +65,6 @@ struct thread_info { .flags = 0, \ .cpu = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ - .addr_limit = KERNEL_DS, \ .ksp = 0, \ } diff --git a/arch/openrisc/include/asm/uaccess.h b/arch/openrisc/include/asm/uaccess.h index 8f049ec99b3e..d6500a374e18 100644 --- a/arch/openrisc/include/asm/uaccess.h +++ b/arch/openrisc/include/asm/uaccess.h @@ -22,29 +22,6 @@ #include <linux/string.h> #include <asm/page.h> #include <asm/extable.h> - -/* - * The fs value determines whether argument validity checking should be - * performed or not. If get_fs() == USER_DS, checking is performed, with - * get_fs() == KERNEL_DS, checking is bypassed. - * - * For historical reasons, these macros are grossly misnamed. - */ - -/* addr_limit is the maximum accessible address for the task. we misuse - * the KERNEL_DS and USER_DS values to both assign and compare the - * addr_limit values through the equally misnamed get/set_fs macros. - * (see above) - */ - -#define KERNEL_DS (~0UL) - -#define USER_DS (TASK_SIZE) -#define get_fs() (current_thread_info()->addr_limit) -#define set_fs(x) (current_thread_info()->addr_limit = (x)) - -#define uaccess_kernel() (get_fs() == KERNEL_DS) - #include <asm-generic/access_ok.h> /* |