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kern_physio: Use MIN() to limit b_bcount
On Wed, Oct 15, 2025 at 12:44:53PM +0200, Mark Kettenis wrote: > > From: Thorsten Blum <thorsten.blum@toblux.com> > > Date: Wed, 15 Oct 2025 11:55:00 +0200 > > Sorry, but these arbitrary code changes are not very useful. They > just create churn that makes looking at the code history harder. Agreed, plus on top MIN() is a special snowflake that should not be used. The macro is not clean, it does multiple evaluations and if you mix types you can get unexpected results. > > Index: kern/kern_physio.c > > =================================================================== > > RCS file: /cvs/src/sys/kern/kern_physio.c,v > > retrieving revision 1.49 > > diff -u -p -r1.49 kern_physio.c > > --- kern/kern_physio.c 3 Feb 2024 18:51:58 -0000 1.49 > > +++ kern/kern_physio.c 15 Oct 2025 00:10:04 -0000 > > @@ -115,10 +115,7 @@ physio(void (*strategy)(struct buf *), d > > * limit b_bcount to LONG_MAX before calling the > > * provided minphys. > > */ > > - if (iovp->iov_len > LONG_MAX) > > - bp->b_bcount = LONG_MAX; > > - else > > - bp->b_bcount = iovp->iov_len; > > + bp->b_bcount = MIN(iovp->iov_len, LONG_MAX); > > > > /* > > * [call minphys to bound the transfer size] > > > > > -- :wq Claudio
kern_physio: Use MIN() to limit b_bcount