[PATCH 05/29] x86/fpu: add might_fault() to user_insn()
From: Sebastian Andrzej Siewior
Date: Wed Nov 28 2018 - 17:21:04 EST
Every user of user_insn() passes an user memory pointer to this macro.
Add might_fault() to user_insn() so we can spot users which are using
this macro in sections where page faulting is not allowed.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
arch/x86/include/asm/fpu/internal.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/include/asm/fpu/internal.h b/arch/x86/include/asm/fpu/internal.h
index 69dcdf195b611..978a1633c0698 100644
--- a/arch/x86/include/asm/fpu/internal.h
+++ b/arch/x86/include/asm/fpu/internal.h
@@ -106,6 +106,7 @@ extern void fpstate_sanitize_xstate(struct fpu *fpu);
#define user_insn(insn, output, input...) \
({ \
int err; \
+ might_fault(); \
asm volatile(ASM_STAC "\n" \
"1:" #insn "\n\t" \
"2: " ASM_CLAC "\n" \
--
2.20.0.rc1