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Date: Tue, 9 Jun 2020 23:25:38 -0700 From: Christoph Hellwig <hch@...radead.org> To: Ritesh Harjani <riteshh@...ux.ibm.com> Cc: linux-ext4@...r.kernel.org, jack@...e.com, tytso@....edu, Hillf Danton <hdanton@...a.com>, linux-fsdevel@...r.kernel.org, Borislav Petkov <bp@...en8.de>, Marek Szyprowski <m.szyprowski@...sung.com>, syzbot+82f324bb69744c5f6969@...kaller.appspotmail.com Subject: Re: [PATCHv2 1/1] ext4: mballoc: Use this_cpu_read instead of this_cpu_ptr On Tue, Jun 09, 2020 at 04:23:10PM +0530, Ritesh Harjani wrote: > Simplify reading a seq variable by directly using this_cpu_read API > instead of doing this_cpu_ptr and then dereferencing it. > > This also avoid the below kernel BUG: which happens when > CONFIG_DEBUG_PREEMPT is enabled I see this warning all the time with ext4 using tests VMs, so lets get this fixed ASAP before -rc1: Reviewed-by: Christoph Hellwig <hch@....de>
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