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x86/kgdb: Replace bool_int_array[NR_CPUS] with bitmap 

Straigntforward conversion from:

    int was_in_debug_nmi[NR_CPUS]

to:

    DECLARE_BITMAP(was_in_debug_nmi, NR_CPUS)

Saves about 2 kbytes in BSS for NR_CPUS=512.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/1443271638-2568-1-git-send-email-dvlasenk@redhat.com
[ Tidied up the code a bit. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Denys Vlasenko 2015-09-26 14:47:17 +02:00 committed by Ingo Molnar
parent 097f70b3c4
commit 0d44975d1e
1 changed files with 11 additions and 6 deletions
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17
arch/x86/kernel/kgdb.c
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@ -511,26 +511,31 @@ single_step_cont(struct pt_regs *regs, struct die_args *args)
return NOTIFY_STOP;
}
static int was_in_debug_nmi[NR_CPUS];
static DECLARE_BITMAP(was_in_debug_nmi, NR_CPUS);
static int kgdb_nmi_handler(unsigned int cmd, struct pt_regs *regs)
{
int cpu;
switch (cmd) {
case NMI_LOCAL:
if (atomic_read(&kgdb_active) != -1) {
/* KGDB CPU roundup */
kgdb_nmicallback(raw_smp_processor_id(), regs);
was_in_debug_nmi[raw_smp_processor_id()] = 1;
cpu = raw_smp_processor_id();
kgdb_nmicallback(cpu, regs);
set_bit(cpu, was_in_debug_nmi);
touch_nmi_watchdog();
return NMI_HANDLED;
}
break;
case NMI_UNKNOWN:
if (was_in_debug_nmi[raw_smp_processor_id()]) {
was_in_debug_nmi[raw_smp_processor_id()] = 0;
cpu = raw_smp_processor_id();
if (__test_and_clear_bit(cpu, was_in_debug_nmi))
return NMI_HANDLED;
}
break;
default:
/* do nothing */