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hamradio: baycom_epp: fix build for UML

Browse source 
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: 68f5d3f3b6 ("um: add PCI over virtio emulation driver")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: linux-um@lists.infradead.org
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Thomas Sailer <t.sailer@alumni.ethz.ch>
Cc: linux-hams@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Randy Dunlap 2021-10-14 19:18:04 -07:00 committed by David S. Miller
parent fac3cb82a5
commit 0a9bb11a5e
1 changed files with 3 additions and 3 deletions
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6
drivers/net/hamradio/baycom_epp.c
View file

@ -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)
{