diff options
| author | Ingo Molnar <[email protected]> | 2017-09-23 14:59:55 +0200 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2017-09-24 13:04:33 +0200 |
| commit | 59dffa4edba1f15b2bfdbe608aca1efe664c674c (patch) | |
| tree | e73464afad967e4fdd474496654688489b96442c | |
| parent | 79fecc2b7506f29fb91becc65e8788e5ae7eba9f (diff) | |
x86/fpu: Remove 'ubuf' parameter from the copy_kernel_to_xstate() API
No change in functionality.
Cc: Andrew Morton <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Eric Biggers <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Yu-cheng Yu <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/include/asm/fpu/xstate.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/fpu/regset.c | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/fpu/xstate.c | 17 |
3 files changed, 5 insertions, 16 deletions
diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h index 79af79dbcab6..f10889bc0c88 100644 --- a/arch/x86/include/asm/fpu/xstate.h +++ b/arch/x86/include/asm/fpu/xstate.h @@ -50,6 +50,6 @@ const void *get_xsave_field_ptr(int xstate_field); int using_compacted_format(void); int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int offset, unsigned int size); int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned int offset, unsigned int size); -int copy_kernel_to_xstate(const void *kbuf, const void __user *ubuf, struct xregs_state *xsave); +int copy_kernel_to_xstate(const void *kbuf, struct xregs_state *xsave); int copy_user_to_xstate(const void *kbuf, const void __user *ubuf, struct xregs_state *xsave); #endif diff --git a/arch/x86/kernel/fpu/regset.c b/arch/x86/kernel/fpu/regset.c index cb45dd81d617..785302c75f38 100644 --- a/arch/x86/kernel/fpu/regset.c +++ b/arch/x86/kernel/fpu/regset.c @@ -136,7 +136,7 @@ int xstateregs_set(struct task_struct *target, const struct user_regset *regset, if (boot_cpu_has(X86_FEATURE_XSAVES)) { if (kbuf) - ret = copy_kernel_to_xstate(kbuf, ubuf, xsave); + ret = copy_kernel_to_xstate(kbuf, xsave); else ret = copy_user_to_xstate(kbuf, ubuf, xsave); } else { diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index 1ad25d1b8056..71cc8d367fdd 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -1089,8 +1089,7 @@ int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned i * there we check the CPU has XSAVES and a whole standard-sized buffer * exists. */ -int copy_kernel_to_xstate(const void *kbuf, const void __user *ubuf, - struct xregs_state *xsave) +int copy_kernel_to_xstate(const void *kbuf, struct xregs_state *xsave) { unsigned int offset, size; int i; @@ -1100,12 +1099,7 @@ int copy_kernel_to_xstate(const void *kbuf, const void __user *ubuf, offset = offsetof(struct xregs_state, header); size = sizeof(xfeatures); - if (kbuf) { - memcpy(&xfeatures, kbuf + offset, size); - } else { - if (__copy_from_user(&xfeatures, ubuf + offset, size)) - return -EFAULT; - } + memcpy(&xfeatures, kbuf + offset, size); /* * Reject if the user sets any disabled or supervisor features: @@ -1124,12 +1118,7 @@ int copy_kernel_to_xstate(const void *kbuf, const void __user *ubuf, offset = xstate_offsets[i]; size = xstate_sizes[i]; - if (kbuf) { - memcpy(dst, kbuf + offset, size); - } else { - if (__copy_from_user(dst, ubuf + offset, size)) - return -EFAULT; - } + memcpy(dst, kbuf + offset, size); } } |