linux-kernel - [PATCH 15/46] x86/xen, lto: Mark xen_vcpu_stolen() as _

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Date:   Mon, 14 Nov 2022 12:43:13 +0100
From:   "Jiri Slaby (SUSE)" <jirislaby@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Andi Kleen <ak@...ux.intel.com>, Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>,
        xen-devel@...ts.xenproject.org, Martin Liska <mliska@...e.cz>,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 15/46] x86/xen, lto: Mark xen_vcpu_stolen() as __visible

From: Andi Kleen <ak@...ux.intel.com>

Symbols referenced from assembler (either directly or e.f. from
DEFINE_STATIC_KEY()) need to be global and visible in gcc LTO because
they could end up in a different object file than the assembler. This
can lead to linker errors without this patch.

So mark xen_vcpu_stolen() as __visible.

Cc: Juergen Gross <jgross@...e.com>
Cc: Stefano Stabellini <sstabellini@...nel.org>
Cc: Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>
Cc: <xen-devel@...ts.xenproject.org>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>
Signed-off-by: Martin Liska <mliska@...e.cz>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/xen/time.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/xen/time.c b/drivers/xen/time.c
index 152dd33bb223..006a04592c8f 100644
--- a/drivers/xen/time.c
+++ b/drivers/xen/time.c
@@ -145,7 +145,7 @@ void xen_get_runstate_snapshot(struct vcpu_runstate_info *res)
 }
 
 /* return true when a vcpu could run but has no real cpu to run on */
-bool xen_vcpu_stolen(int vcpu)
+__visible bool xen_vcpu_stolen(int vcpu)
 {
 	return per_cpu(xen_runstate, vcpu).state == RUNSTATE_runnable;
 }
-- 
2.38.1