Messages in this thread | | | Subject | Re: error: implicit declaration of function 'zero_bytemask' | From | Michal Sojka <> | Date | Wed, 07 Oct 2015 15:41:04 +0200 |
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On 7. října 2015 15:29:28 CEST, Chris Metcalf <cmetcalf@ezchip.com> wrote: >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!
The patch is already in mainline so I guess a fixup patch would be more appropriate.
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