diff options
author | Arnd Bergmann <arnd@arndb.de> | 2021-08-11 08:30:26 +0100 |
---|---|---|
committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2021-08-20 11:39:27 +0100 |
commit | 8ac6f5d7f84bf362e67591708bcb9788cdc42c50 (patch) | |
tree | b550f0848c7bf5a43991f70ad71937b560d49dc5 /arch/arm/include/asm/thread_info.h | |
parent | 2df4c9a741a0b5e2883cc356c1b724d1f739fb55 (diff) |
ARM: 9113/1: uaccess: remove set_fs() implementation
There are no remaining callers of set_fs(), so just remove it
along with all associated code that operates on
thread_info->addr_limit.
There are still further optimizations that can be done:
- In get_user(), the address check could be moved entirely
into the out of line code, rather than passing a constant
as an argument,
- I assume the DACR handling can be simplified as we now
only change it during user access when CONFIG_CPU_SW_DOMAIN_PAN
is set, but not during set_fs().
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/thread_info.h')
-rw-r--r-- | arch/arm/include/asm/thread_info.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/arm/include/asm/thread_info.h b/arch/arm/include/asm/thread_info.h index 17c56051747b..d89931aed59f 100644 --- a/arch/arm/include/asm/thread_info.h +++ b/arch/arm/include/asm/thread_info.h @@ -31,8 +31,6 @@ struct task_struct; #include <asm/types.h> -typedef unsigned long mm_segment_t; - struct cpu_context_save { __u32 r4; __u32 r5; @@ -54,7 +52,6 @@ struct cpu_context_save { struct thread_info { unsigned long flags; /* low level flags */ int preempt_count; /* 0 => preemptable, <0 => bug */ - mm_segment_t addr_limit; /* address limit */ struct task_struct *task; /* main task structure */ __u32 cpu; /* cpu */ __u32 cpu_domain; /* cpu domain */ @@ -80,7 +77,6 @@ struct thread_info { .task = &tsk, \ .flags = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ - .addr_limit = KERNEL_DS, \ } /* |