Hi Jian, On Wed, Mar 31, 2021 at 02:27:03PM -0700, Jian Cai wrote: > Hi Nathan, > > I just realized you already proposed solutions for skipping the check > in https://lore.kernel.org/linux-block/20210310225240.4epj2mdmzt4vurr3@archlinux-ax161/#t. > Do you have any plans to send them for review? > > Thanks, > Jian I was hoping to gather some feedback on which option would be preferred by Jens and the other ClangBuiltLinux folks before I sent them along. I can send the first just to see what kind of feedback I can gather. Cheers, Nathan > On Tue, Mar 30, 2021 at 6:31 PM Jian Cai <jiancai@xxxxxxxxxx> wrote: > > > > Thanks for all the information. I'll check for similar instances and > > send an updated version. > > > > > > On Tue, Mar 30, 2021 at 5:26 PM Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > > > > > > On 3/30/21 4:29 PM, Nathan Chancellor wrote: > > > > Hi Jian, > > > > > > > > On Tue, Mar 30, 2021 at 04:02:49PM -0700, Jian Cai wrote: > > > >> This fixes the mismatch of alignments between csd and its use as an > > > >> argument to smp_call_function_single_async, which causes build failure > > > >> when -Walign-mismatch in Clang is used. > > > >> > > > >> Link: > > > >> http://crrev.com/c/1193732 > > > >> > > > >> Suggested-by: Guenter Roeck <linux@xxxxxxxxxxxx> > > > >> Signed-off-by: Jian Cai <jiancai@xxxxxxxxxx> > > > > > > > > Thanks for the patch. This is effectively a revert of commit > > > > 4ccafe032005 ("block: unalign call_single_data in struct request"), > > > > which I had brought up in this thread: > > > > > > > > https://lore.kernel.org/r/20210310182307.zzcbi5w5jrmveld4@archlinux-ax161/ > > > > > > > > This is obviously a correct fix, I am not just sure what the impact to > > > > 'struct request' will be. > > > > > > > > > > As commit 4ccafe032005 states, it increases the request structure size. > > > Given the exchange referenced above, I think we'll need to disable > > > the warning in the block code. > > > > > > Thanks, > > > Guenter > > > > > > > Cheers, > > > > Nathan > > > > > > > >> --- > > > >> include/linux/blkdev.h | 2 +- > > > >> 1 file changed, 1 insertion(+), 1 deletion(-) > > > >> > > > >> diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h > > > >> index bc6bc8383b43..3b92330d95ad 100644 > > > >> --- a/include/linux/blkdev.h > > > >> +++ b/include/linux/blkdev.h > > > >> @@ -231,7 +231,7 @@ struct request { > > > >> unsigned long deadline; > > > >> > > > >> union { > > > >> - struct __call_single_data csd; > > > >> + call_single_data_t csd; > > > >> u64 fifo_time; > > > >> }; > > > >> > > > >> -- > > > >> 2.31.0.291.g576ba9dcdaf-goog > > > >> > > >
