Messages in this thread | | | Subject | Re: error: implicit declaration of function 'zero_bytemask' | From | Chris Metcalf <> | Date | Wed, 7 Oct 2015 09:29:28 -0400 |
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On 10/07/2015 08:53 AM, Michal Sojka wrote: > Dear Chris, > > the following commit breaks my Linux build. > > commit 990486c8af044f89bddfbde1d1cf9fde449bedbf > Author: Chris Metcalf <cmetcalf@ezchip.com> > Date: Tue Oct 6 12:37:41 2015 -0400 > > strscpy: zero any trailing garbage bytes in the destination > > It's possible that the destination can be shadowed in userspace > (as, for example, the perf buffers are now). So we should take > care not to leak data that could be inspected by userspace. > > The error message is: > > lib/string.c: In function 'strscpy': > lib/string.c:209:4: error: implicit declaration of function 'zero_bytemask' [-Werror=implicit-function-declaration] > cc1: some warnings being treated as errors > > I compile the kernel for PowerPC (32 bit) with the attached config.
Ah, it appears that big-endian powerpc does not provide zero_bytemask(), only little-endian. I'll fix this in v3 of the patch series - thanks!
-- Chris Metcalf, EZChip Semiconductor http://www.ezchip.com
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