So init_thread_xstate() is a misnomer in that it's not really related to a 
specific
thread - it determines, once during initial bootup, the size of the xstate 
context.

Also improve the comments.

Reviewed-by: Borislav Petkov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
---
 arch/x86/kernel/i387.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index 5b4672584e65..01101553c6c1 100644
--- a/arch/x86/kernel/i387.c
+++ b/arch/x86/kernel/i387.c
@@ -158,7 +158,7 @@ static void mxcsr_feature_mask_init(void)
        mxcsr_feature_mask &= mask;
 }
 
-static void init_thread_xstate(void)
+static void fpstate_xstate_init_size(void)
 {
        /*
         * Note that xstate_size might be overwriten later during
@@ -216,11 +216,11 @@ void fpu__cpu_init(void)
        write_cr0(cr0);
 
        /*
-        * init_thread_xstate is only called once to avoid overriding
-        * xstate_size during boot time or during CPU hotplug.
+        * fpstate_xstate_init_size() is only called once, to avoid overriding
+        * 'xstate_size' during (secondary CPU) bootup or during CPU hotplug.
         */
        if (xstate_size == 0)
-               init_thread_xstate();
+               fpstate_xstate_init_size();
 
        mxcsr_feature_mask_init();
        xsave_init();
-- 
2.1.0

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