[Skiboot] [PATCH v3] Fix array-bound compilation warnings

[Joel Stanley]

On Fri, 4 Feb 2022 at 12:33, Cédric Le Goater <clg at kaod.org> wrote:
>
> On 1/24/22 14:56, Abhishek Singh Tomar wrote:
> > Resolves : the warray bounds warning during compilation
> >
> > /build/libc/include/string.h:34:16: warning: '__builtin_memset' offset [0, 2097151] is out of the bounds [0, 0] [-Warray-bounds]
> > 34 | #define memset __builtin_memset
> > hw/fsp/fsp.c:1855:9: note: in expansion of macro 'memset'
> > 1855 | memset(fsp_tce_table, 0, PSI_TCE_TABLE_SIZE);
> >
> > use volatile pointer to avoid optimization introduced with gcc-11 on constant
> > address assignment to pointer.
> >
> > Signed-off-by: Abhishek Singh Tomar <abhishek at linux.ibm.com>
>
> It might not be the definitive solution but it does remove all the warnings
> we have been seeing lately.

It appears that this behavior has been changed in GCC 12, and
backported to GCC 11:

 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99578

Assuming the cases in this patch are the same as those silenced by the
change, we should consider reverting the patch once the updated
compiler is released and available.