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    Subject[patch 1/4] net: Percpufy frequently used variables -- add percpu_counter_mod_bh
    Add percpu_counter_mod_bh for using these counters safely from
    both softirq and process context.

    Signed-off by: Pravin B. Shelar <pravins@calsoftinc.com>
    Signed-off by: Ravikiran G Thirumalai <kiran@scalex86.org>
    Signed-off by: Shai Fultheim <shai@scalex86.org>

    Index: linux-2.6.16-rc1/include/linux/percpu_counter.h
    ===================================================================
    --- linux-2.6.16-rc1.orig/include/linux/percpu_counter.h 2006-01-25 11:53:56.000000000 -0800
    +++ linux-2.6.16-rc1/include/linux/percpu_counter.h 2006-01-25 12:09:41.000000000 -0800
    @@ -11,6 +11,7 @@
    #include <linux/smp.h>
    #include <linux/threads.h>
    #include <linux/percpu.h>
    +#include <linux/interrupt.h>

    #ifdef CONFIG_SMP

    @@ -102,4 +103,11 @@ static inline void percpu_counter_dec(st
    percpu_counter_mod(fbc, -1);
    }

    +static inline void percpu_counter_mod_bh(struct percpu_counter *fbc, long amount)
    +{
    + local_bh_disable();
    + percpu_counter_mod(fbc, amount);
    + local_bh_enable();
    +}
    +
    #endif /* _LINUX_PERCPU_COUNTER_H */
    -
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