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lib: crc32: conditionally resched when running testcases

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Fengguang reports that when crc32 selftests are running on startup, on
some e.g. 32bit systems, we can get a CPU stall like "INFO: rcu_sched
self-detected stall on CPU { 0} (t=2101 jiffies g=4294967081 c=4294967080
q=41)". As this is not intended, add a cond_resched() at the end of a
test case to fix it. Introduced by efba721f63 ("lib: crc32: add test cases
for crc32{, c}_combine routines").

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann 2013-11-04 17:10:26 +01:00 committed by David S. Miller
parent cea80ea8d2
commit cc0ac19995
1 changed files with 3 additions and 0 deletions
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3
lib/crc32.c
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@ -29,6 +29,7 @@
#include <linux/crc32.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/sched.h>
#include "crc32defs.h"
#if CRC_LE_BITS > 8
@ -1054,6 +1055,7 @@ static int __init crc32c_combine_test(void)
crc_full == test[i].crc32c_le))
errors++;
runs++;
cond_resched();
}
}
@ -1147,6 +1149,7 @@ static int __init crc32_combine_test(void)
crc_full == test[i].crc_le))
errors++;
runs++;
cond_resched();
}
}