[PATCH 2/3] x86/fpu/xstate: Make xfeature_is_supervisor()/xfeature_is_user() return bool

From: Yu-cheng Yu
Date: Thu Dec 05 2019 - 13:41:16 EST


In the previous patch, xfeature_is_supervisor()'s description is revised,
and since xfeature_is_supervisor()/xfeature_is_user() are used only in
boolean context, make both return bool.

Suggested-by: Borislav Petkov <bp@xxxxxxx>
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx>
---
arch/x86/kernel/fpu/xstate.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index cfcac7b42e5e..912bdfce10dd 100644
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -107,7 +107,7 @@ int cpu_has_xfeatures(u64 xfeatures_needed, const char **feature_name)
}
EXPORT_SYMBOL_GPL(cpu_has_xfeatures);

-static int xfeature_is_supervisor(int xfeature_nr)
+static bool xfeature_is_supervisor(int xfeature_nr)
{
/*
* Extended State Enumeration Sub-leaves (EAX = 0DH, ECX = n, n > 1)
@@ -117,10 +117,10 @@ static int xfeature_is_supervisor(int xfeature_nr)
u32 eax, ebx, ecx, edx;

cpuid_count(XSTATE_CPUID, xfeature_nr, &eax, &ebx, &ecx, &edx);
- return !!(ecx & 1);
+ return ecx & 1;
}

-static int xfeature_is_user(int xfeature_nr)
+static bool xfeature_is_user(int xfeature_nr)
{
return !xfeature_is_supervisor(xfeature_nr);
}
--
2.17.1