Date: Wed, 20 Jun 2012 11:41:01 +0400 From: Gennady Proskurin <gprspb@mail.ru> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: svn-src-head@freebsd.org, Daniel O'Connor <doconnor@gsoft.com.au>, Gennady Proskurin <gprspb@mail.ru>, src-committers@freebsd.org, svn-src-all@freebsd.org Subject: Re: svn commit: r237223 - head/sys/dev/fb Message-ID: <20120620074101.GA832@gpr.nnz-home.ru> In-Reply-To: <31750.1340083631@critter.freebsd.dk> References: <68FBE843-7337-4C90-B01F-E0CAABB62BCD@gsoft.com.au> <31750.1340083631@critter.freebsd.dk>
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On Tue, Jun 19, 2012 at 05:27:11AM +0000, Poul-Henning Kamp wrote:
> In message <68FBE843-7337-4C90-B01F-E0CAABB62BCD@gsoft.com.au>, "Daniel O'Conno
> r" writes:
>
> >> If size is odd, this does not copy the last byte. Not sure, whether =
> >this is intended.
>
> Feel free to improve...
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Index: fbreg.h
===================================================================
--- fbreg.h (revision 237289)
+++ fbreg.h (working copy)
@@ -39,9 +39,12 @@
static __inline void
copyw(uint16_t *src, uint16_t *dst, size_t size)
{
+ const int is_odd = (size & 0x1);
size >>= 1;
while (size--)
*dst++ = *src++;
+ if (is_odd)
+ *(char*)dst = *(char*)src; // copy last byte
}
#define bcopy_io(s, d, c) copyw((void*)(s), (void*)(d), (c))
#define bcopy_toio(s, d, c) copyw((void*)(s), (void*)(d), (c))
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