On Wed, 25 Mar 2020 at 20:11, Laszlo Ersek <ler...@redhat.com> wrote: > > On 03/25/20 10:33, Ard Biesheuvel wrote: > > Older GCC (<= 4.9) fail to infer that Parent is never used unless it > > has been assigned before, and may throw an error like > > > > /work/git/edk2/ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c: > > In function ‘PlatformPeim’: > > /work/git/edk2/ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c:132:24: > > error: ‘Parent’ may be used uninitialized in this function > > > > [-Werror=maybe-uninitialized] > > RangesProp = fdt_getprop (Base, Parent, "ranges", &RangesLen); > > > > Set Parent to 0 at the start of the sequence to work around this. > > > > Link: https://bugzilla.tianocore.org/show_bug.cgi?id=2601 > > Fixes: 82662a3b5f56e974 ("ArmVirtPkg/PlatformPeiLib: discover the TPM base > > ...") > > Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org> > > --- > > ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c | 5 +++++ > > 1 file changed, 5 insertions(+) > > > > diff --git a/ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c > > b/ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c > > index 8b5b3dd5dc1c..6c4028e17995 100644 > > --- a/ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c > > +++ b/ArmVirtPkg/Library/PlatformPeiLib/PlatformPeiLib.c > > @@ -77,6 +77,11 @@ PlatformPeim ( > > > > TpmBase = 0; > > > > + // > > + // Set Parent to suppress incorrect compiler/analyzer warnings. > > + // > > + Parent = 0; > > + > > for (Prev = Depth = 0;; Prev = Node) { > > Node = fdt_next_node (Base, Prev, &Depth); > > if (Node < 0) { > > > > Reviewed-by: Laszlo Ersek <ler...@redhat.com> >
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