Revision 70fb3e41a97a5fecc0aedc9a429479d702c3ab66 authored by Ben Gardon on 15 March 2021, 23:38:00 UTC, committed by Paolo Bonzini on 16 March 2021, 18:14:59 UTC
The pt passed into handle_removed_tdp_mmu_page does not need RCU protection, as it is not at any risk of being freed by another thread at that point. However, the implicit cast from tdp_sptep_t to u64 * dropped the __rcu annotation without a proper rcu_derefrence. Fix this by passing the pt as a tdp_ptep_t and then rcu_dereferencing it in the function. Suggested-by: Sean Christopherson <seanjc@google.com> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Ben Gardon <bgardon@google.com> Message-Id: <20210315233803.2706477-2-bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 parent 1e28eed
ld-version.sh
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
#
# Print the linker name and its version in a 5 or 6-digit form.
# Also, perform the minimum version check.
set -e
# When you raise the minimum linker version, please update
# Documentation/process/changes.rst as well.
bfd_min_version=2.23.0
lld_min_version=10.0.1
# Convert the version string x.y.z to a canonical 5 or 6-digit form.
get_canonical_version()
{
IFS=.
set -- $1
# If the 2nd or 3rd field is missing, fill it with a zero.
#
# The 4th field, if present, is ignored.
# This occurs in development snapshots as in 2.35.1.20201116
echo $((10000 * $1 + 100 * ${2:-0} + ${3:-0}))
}
orig_args="$@"
# Get the first line of the --version output.
IFS='
'
set -- $(LC_ALL=C "$@" --version)
# Split the line on spaces.
IFS=' '
set -- $1
if [ "$1" = GNU -a "$2" = ld ]; then
shift $(($# - 1))
version=$1
min_version=$bfd_min_version
name=BFD
disp_name="GNU ld"
elif [ "$1" = GNU -a "$2" = gold ]; then
echo "gold linker is not supported as it is not capable of linking the kernel proper." >&2
exit 1
else
while [ $# -gt 1 -a "$1" != "LLD" ]; do
shift
done
if [ "$1" = LLD ]; then
version=$2
min_version=$lld_min_version
name=LLD
disp_name=LLD
else
echo "$orig_args: unknown linker" >&2
exit 1
fi
fi
# Some distributions append a package release number, as in 2.34-4.fc32
# Trim the hyphen and any characters that follow.
version=${version%-*}
cversion=$(get_canonical_version $version)
min_cversion=$(get_canonical_version $min_version)
if [ "$cversion" -lt "$min_cversion" ]; then
echo >&2 "***"
echo >&2 "*** Linker is too old."
echo >&2 "*** Your $disp_name version: $version"
echo >&2 "*** Minimum $disp_name version: $min_version"
echo >&2 "***"
exit 1
fi
echo $name $cversion
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