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由 Ingo Molnar 提交于
kfree(NULL) is valid. pointed out by checkpatch.pl. the fix shrinks the code a bit: text data bss dec hex filename 40024 3842 100 43966 abbe sched.o.before 40002 3842 100 43944 aba8 sched.o.after Signed-off-by: NIngo Molnar <mingo@elte.hu>
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