From: S.Caglar Onur The functions time_before, time_before_eq, time_after, and time_after_eq are more robust for comparing jiffies against other values. So use the time_after() macro, defined in linux/jiffies.h, which deals with wrapping correctl [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: S.Caglar Onur Cc: Kyle McMartin Cc: Matthew Wilcox Cc: Grant Grundler Signed-off-by: Andrew Morton --- arch/parisc/kernel/unaligned.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff -puN arch/parisc/kernel/unaligned.c~arch-parisc-kernel-unalignedc-use-time_-macros arch/parisc/kernel/unaligned.c --- a/arch/parisc/kernel/unaligned.c~arch-parisc-kernel-unalignedc-use-time_-macros +++ a/arch/parisc/kernel/unaligned.c @@ -460,7 +460,8 @@ void handle_unaligned(struct pt_regs *re goto force_sigbus; } - if (unaligned_count > 5 && jiffies - last_time > 5*HZ) { + if (unaligned_count > 5 && + time_after(jiffies, last_time + 5 * HZ)) { unaligned_count = 0; last_time = jiffies; } _