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由 Pavel Tatashin 提交于
When checking for valid pfns in zero_resv_unavail(), it is not necessary to verify that pfns within pageblock_nr_pages ranges are valid, only the first one needs to be checked. This is because memory for pages are allocated in contiguous chunks that contain pageblock_nr_pages struct pages. Link: http://lkml.kernel.org/r/20181002143821.5112-3-msys.mizuma@gmail.comSigned-off-by: NPavel Tatashin <pavel.tatashin@microsoft.com> Signed-off-by: NMasayoshi Mizuma <m.mizuma@jp.fujitsu.com> Reviewed-by: NMasayoshi Mizuma <m.mizuma@jp.fujitsu.com> Acked-by: NNaoya Horiguchi <n-horiguchi@ah.jp.nec.com> Reviewed-by: NOscar Salvador <osalvador@suse.de> Cc: Ingo Molnar <mingo@kernel.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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