linux-kernel - [PATCH x86/core] x86/paravirt: Fix a !PARAVIRT build warning

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Message-ID: <Y1AtAXM8YjtBm2cj@zn.tnic>
Date:   Wed, 19 Oct 2022 18:59:45 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     virtualization@...ts.linux-foundation.org, x86-ml <x86@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: [PATCH x86/core] x86/paravirt: Fix a !PARAVIRT build warning

Hi,

this goes ontop of x86/core as the issue is caused by one of the
includes in callthunks.c there.

Thx.

---
From: Borislav Petkov <bp@...e.de>

Fix

  ./include/trace/events/xen.h:28:31: warning: ‘enum paravirt_lazy_mode’ \
    declared inside parameter list will not be visible outside of this definition or declaration

which turns into a build error:

  ./include/trace/events/xen.h:28:50: error: parameter 1 (‘mode’) has incomplete type
     28 |                 TP_PROTO(enum paravirt_lazy_mode mode), \

due to enum paravirt_lazy_mode being visible only under CONFIG_PARAVIRT.
Just pull it up where it is unconditionally visible.

Signed-off-by: Borislav Petkov <bp@...e.de>
---
 arch/x86/include/asm/paravirt_types.h | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index e137d9412123..27c692791b7e 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -9,6 +9,13 @@ struct paravirt_patch_site {
 	u8 type;		/* type of this instruction */
 	u8 len;			/* length of original instruction */
 };
+
+/* Lazy mode for batching updates / context switch */
+enum paravirt_lazy_mode {
+	PARAVIRT_LAZY_NONE,
+	PARAVIRT_LAZY_MMU,
+	PARAVIRT_LAZY_CPU,
+};
 #endif
 
 #ifdef CONFIG_PARAVIRT
@@ -582,13 +589,6 @@ int paravirt_disable_iospace(void);
 	__PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2),	\
 		     PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4))
 
-/* Lazy mode for batching updates / context switch */
-enum paravirt_lazy_mode {
-	PARAVIRT_LAZY_NONE,
-	PARAVIRT_LAZY_MMU,
-	PARAVIRT_LAZY_CPU,
-};
-
 enum paravirt_lazy_mode paravirt_get_lazy_mode(void);
 void paravirt_start_context_switch(struct task_struct *prev);
 void paravirt_end_context_switch(struct task_struct *next);
-- 
2.35.1


-- 
Regards/Gruss,
    Boris.

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