diff options
| author | Ingo Molnar <mingo@kernel.org> | 2017-09-23 14:59:54 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-09-24 13:04:32 +0200 |
| commit | 79fecc2b7506f29fb91becc65e8788e5ae7eba9f (patch) | |
| tree | 5ad9f00c74b7cc12b6f892fba66253d47cb1bdfa /arch/x86/kernel/fpu/regset.c | |
| parent | 8c0817f4a3188ac5485ce14f96f12a175800b881 (diff) | |
x86/fpu: Split copy_user_to_xstate() into copy_kernel_to_xstate() & copy_user_to_xstate()
Similar to:
x86/fpu: Split copy_xstate_to_user() into copy_xstate_to_kernel() & copy_xstate_to_user()
No change in functionality.
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Eric Biggers <ebiggers3@gmail.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yu-cheng Yu <yu-cheng.yu@intel.com>
Link: http://lkml.kernel.org/r/20170923130016.21448-12-mingo@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/fpu/regset.c')
| -rw-r--r-- | arch/x86/kernel/fpu/regset.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/x86/kernel/fpu/regset.c b/arch/x86/kernel/fpu/regset.c index ec1404194b65..cb45dd81d617 100644 --- a/arch/x86/kernel/fpu/regset.c +++ b/arch/x86/kernel/fpu/regset.c @@ -134,10 +134,14 @@ int xstateregs_set(struct task_struct *target, const struct user_regset *regset, fpu__activate_fpstate_write(fpu); - if (boot_cpu_has(X86_FEATURE_XSAVES)) - ret = copy_user_to_xstate(kbuf, ubuf, xsave); - else + if (boot_cpu_has(X86_FEATURE_XSAVES)) { + if (kbuf) + ret = copy_kernel_to_xstate(kbuf, ubuf, xsave); + else + ret = copy_user_to_xstate(kbuf, ubuf, xsave); + } else { ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, xsave, 0, -1); + } /* * In case of failure, mark all states as init: |