[PATCH 5.14 038/169] hamradio: baycom_epp: fix build for UML

[Greg Kroah-Hartman]

From: Randy Dunlap <rdunlap at infradead.org>

[ Upstream commit 0a9bb11a5e298e72b675255a4bb2893513000584 ]

On i386, the baycom_epp driver wants to inspect X86 CPU features (TSC)
and then act on that data, but that info is not available when running
on UML, so prevent that test and do the default action.

Prevents this build error on UML + i386:

../drivers/net/hamradio/baycom_epp.c: In function ‘epp_bh’:
../drivers/net/hamradio/baycom_epp.c:630:6: error: implicit declaration of function ‘boot_cpu_has’; did you mean ‘get_cpu_mask’? [-Werror=implicit-function-declaration]
  if (boot_cpu_has(X86_FEATURE_TSC))   \
      ^
../drivers/net/hamradio/baycom_epp.c:658:2: note: in expansion of macro ‘GETTICK’
  GETTICK(time1);

Fixes: 68f5d3f3b654 ("um: add PCI over virtio emulation driver")
Signed-off-by: Randy Dunlap <rdunlap at infradead.org>
Cc: linux-um at lists.infradead.org
Cc: Jeff Dike <jdike at addtoit.com>
Cc: Richard Weinberger <richard at nod.at>
Cc: Anton Ivanov <anton.ivanov at cambridgegreys.com>
Cc: "David S. Miller" <davem at davemloft.net>
Cc: Jakub Kicinski <kuba at kernel.org>
Cc: Thomas Sailer <t.sailer at alumni.ethz.ch>
Cc: linux-hams at vger.kernel.org
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 drivers/net/hamradio/baycom_epp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/hamradio/baycom_epp.c b/drivers/net/hamradio/baycom_epp.c
index 4435a1195194..8ea8d50f81c4 100644
--- a/drivers/net/hamradio/baycom_epp.c
+++ b/drivers/net/hamradio/baycom_epp.c
@@ -623,16 +623,16 @@ static int receive(struct net_device *dev, int cnt)
 
 /* --------------------------------------------------------------------- */
 
-#ifdef __i386__
+#if defined(__i386__) && !defined(CONFIG_UML)
 #include <asm/msr.h>
 #define GETTICK(x)						\
 ({								\
 	if (boot_cpu_has(X86_FEATURE_TSC))			\
 		x = (unsigned int)rdtsc();			\
 })
-#else /* __i386__ */
+#else /* __i386__  && !CONFIG_UML */
 #define GETTICK(x)
-#endif /* __i386__ */
+#endif /* __i386__  && !CONFIG_UML */
 
 static void epp_bh(struct work_struct *work)
 {
-- 
2.33.0