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| author | Andy Lutomirski <luto@kernel.org> | 2016-07-14 23:22:57 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-07-15 11:26:30 +0300 |
| commit | 13d4ea097d18b419ad2a2b696063d44bf59acec0 (patch) | |
| tree | 099cb3a4ee73be56742d6abcd3d5e2bdd541f65b /arch/x86/lib/copy_user_64.S | |
| parent | 2a53ccbc0de1b1950aeedd24680f7eca65c86ff5 (diff) | |
| download | linux-13d4ea097d18b419ad2a2b696063d44bf59acec0.tar.xz | |
x86/uaccess: Move thread_info::addr_limit to thread_struct
struct thread_info is a legacy mess. To prepare for its partial removal,
move thread_info::addr_limit out.
As an added benefit, this way is simpler.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/15bee834d09402b47ac86f2feccdf6529f9bc5b0.1468527351.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/lib/copy_user_64.S')
| -rw-r--r-- | arch/x86/lib/copy_user_64.S | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/x86/lib/copy_user_64.S b/arch/x86/lib/copy_user_64.S index 2b0ef26da0bd..bf603ebbfd8e 100644 --- a/arch/x86/lib/copy_user_64.S +++ b/arch/x86/lib/copy_user_64.S @@ -17,11 +17,11 @@ /* Standard copy_to_user with segment limit checking */ ENTRY(_copy_to_user) - GET_THREAD_INFO(%rax) + mov PER_CPU_VAR(current_task), %rax movq %rdi,%rcx addq %rdx,%rcx jc bad_to_user - cmpq TI_addr_limit(%rax),%rcx + cmpq TASK_addr_limit(%rax),%rcx ja bad_to_user ALTERNATIVE_2 "jmp copy_user_generic_unrolled", \ "jmp copy_user_generic_string", \ @@ -32,11 +32,11 @@ ENDPROC(_copy_to_user) /* Standard copy_from_user with segment limit checking */ ENTRY(_copy_from_user) - GET_THREAD_INFO(%rax) + mov PER_CPU_VAR(current_task), %rax movq %rsi,%rcx addq %rdx,%rcx jc bad_from_user - cmpq TI_addr_limit(%rax),%rcx + cmpq TASK_addr_limit(%rax),%rcx ja bad_from_user ALTERNATIVE_2 "jmp copy_user_generic_unrolled", \ "jmp copy_user_generic_string", \ |