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net: fix compilation when busy poll is not enabled 

MIN_NAPI_ID is used in various places outside of
CONFIG_NET_RX_BUSY_POLL wrapping, so when it's not set
we run into build errors such as:

  net/core/dev.c: In function 'dev_get_by_napi_id':
  net/core/dev.c:886:16: error: ‘MIN_NAPI_ID’ undeclared (first use in this function)
    if (napi_id < MIN_NAPI_ID)
                  ^~~~~~~~~~~

Thus, have MIN_NAPI_ID always defined to fix these errors.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
zero-colors
Daniel Borkmann 2017-08-11 18:31:24 +02:00 committed by David S. Miller
parent 54a6a043fb
commit e4dde41273
1 changed files with 6 additions and 6 deletions
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12
include/net/busy_poll.h
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@ -29,18 +29,18 @@
#include <linux/sched/signal.h>
#include <net/ip.h>
#ifdef CONFIG_NET_RX_BUSY_POLL
struct napi_struct;
extern unsigned int sysctl_net_busy_read __read_mostly;
extern unsigned int sysctl_net_busy_poll __read_mostly;
/* 0 - Reserved to indicate value not set
* 1..NR_CPUS - Reserved for sender_cpu
* NR_CPUS+1..~0 - Region available for NAPI IDs
*/
#define MIN_NAPI_ID ((unsigned int)(NR_CPUS + 1))
#ifdef CONFIG_NET_RX_BUSY_POLL
struct napi_struct;
extern unsigned int sysctl_net_busy_read __read_mostly;
extern unsigned int sysctl_net_busy_poll __read_mostly;
static inline bool net_busy_loop_on(void)
{
return sysctl_net_busy_poll;