[tip:x86/fpu] x86/fpu: Clean up the parameter definitions of copy_xstate_to_*()

[tip-bot for Ingo Molnar]

Commit-ID:  becb2bb72ff906cc0d2bac3ee9574f694364823b
Gitweb:     http://git.kernel.org/tip/becb2bb72ff906cc0d2bac3ee9574f694364823b
Author:     Ingo Molnar <mingo@xxxxxxxxxx>
AuthorDate: Sat, 23 Sep 2017 14:59:49 +0200
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Sun, 24 Sep 2017 13:04:31 +0200

x86/fpu: Clean up the parameter definitions of copy_xstate_to_*()

Remove pointless 'const' of non-pointer input parameter.

Remove unnecessary parenthesis that shows uncertainty about arithmetic operator precedence.

Clarify copy_xstate_to_user() description.

No change in functionality.

Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Eric Biggers <ebiggers3@xxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx>
Link: http://lkml.kernel.org/r/20170923130016.21448-7-mingo@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 arch/x86/kernel/fpu/xstate.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index 0a29946..9647e72 100644
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -927,13 +927,13 @@ int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
 static inline int
 __copy_xstate_to_kernel(void *kbuf,
 			const void *data,
-			unsigned int pos, unsigned int count, const int start_pos, const int end_pos)
+			unsigned int pos, unsigned int count, int start_pos, int end_pos)
 {
 	if ((count == 0) || (pos < start_pos))
 		return 0;
 
 	if (end_pos < 0 || pos < end_pos) {
-		unsigned int copy = (end_pos < 0 ? count : min(count, end_pos - pos));
+		unsigned int copy = end_pos < 0 ? count : min(count, end_pos - pos);
 
 		memcpy(kbuf + pos, data, copy);
 	}
@@ -1010,13 +1010,13 @@ int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int po
 }
 
 static inline int
-__copy_xstate_to_user(void __user *ubuf, const void *data, unsigned int pos, unsigned int count, const int start_pos, const int end_pos)
+__copy_xstate_to_user(void __user *ubuf, const void *data, unsigned int pos, unsigned int count, int start_pos, int end_pos)
 {
 	if ((count == 0) || (pos < start_pos))
 		return 0;
 
 	if (end_pos < 0 || pos < end_pos) {
-		unsigned int copy = (end_pos < 0 ? count : min(count, end_pos - pos));
+		unsigned int copy = end_pos < 0 ? count : min(count, end_pos - pos);
 
 		if (__copy_to_user(ubuf + pos, data, copy))
 			return -EFAULT;
@@ -1026,7 +1026,7 @@ __copy_xstate_to_user(void __user *ubuf, const void *data, unsigned int pos, uns
 
 /*
  * Convert from kernel XSAVES compacted format to standard format and copy
- * to a ptrace buffer. It supports partial copy but pos always starts from
+ * to a user-space buffer. It supports partial copy but pos always starts from
  * zero. This is called from xstateregs_get() and there we check the CPU
  * has XSAVES.
  */