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#!/bin/sh
# Test one of the main kernel Makefile targets to generate a perf sources tarball
# suitable for build outside the full kernel sources.
#
# This is to test that the tools/perf/MANIFEST file lists all the files needed to
# be in such tarball, which sometimes gets broken when we move files around,
# like when we made some files that were in tools/perf/ available to other tools/
# codebases by moving it to tools/include/, etc.

PERF=$1
cd ${PERF}/../..
make perf-targz-src-pkg > /dev/null
TARBALL=$(ls -rt perf-*.tar.gz)
TMP_DEST=$(mktemp -d)
tar xf ${TARBALL} -C $TMP_DEST
rm -f ${TARBALL}
cd - > /dev/null
make -C $TMP_DEST/perf*/tools/perf > /dev/null
RC=$?
rm -rf ${TMP_DEST}
exit $RC
143'>tools/include parent4d191b1b63c209e37bf27938ef365244d3c41084 (diff)
PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
In a struct pcie_link_state, link->root points to the pcie_link_state of the root of the PCIe hierarchy. For the topmost link, this points to itself (link->root = link). For others, we copy the pointer from the parent (link->root = link->parent->root). Previously we recognized that Root Ports originated PCIe hierarchies, but we treated PCI/PCI-X to PCIe Bridges as being in the middle of the hierarchy, and when we tried to copy the pointer from link->parent->root, there was no parent, and we dereferenced a NULL pointer: BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 IP: [<ffffffff9e424350>] pcie_aspm_init_link_state+0x170/0x820 Recognize that PCI/PCI-X to PCIe Bridges originate PCIe hierarchies just like Root Ports do, so link->root for these devices should also point to itself. Fixes: 51ebfc92b72b ("PCI: Enumerate switches below PCI-to-PCIe bridges") Link: https://bugzilla.kernel.org/show_bug.cgi?id=193411 Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1022181 Tested-by: lists@ssl-mail.com Tested-by: Jayachandran C. <jnair@caviumnetworks.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v4.2+
Diffstat (limited to 'tools/include')