#!/bin/sh # Script to create/update include/generated/autoksyms.h and dependency files # # Copyright: (C) 2016 Linaro Limited # Created by: Nicolas Pitre, January 2016 # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 as # published by the Free Software Foundation. # Create/update the include/generated/autoksyms.h file from the list # of all module's needed symbols as recorded on the third line of # .tmp_versions/*.mod files. # # For each symbol being added or removed, the corresponding dependency # file's timestamp is updated to force a rebuild of the affected source # file. All arguments passed to this script are assumed to be a command # to be exec'd to trigger a rebuild of those files. set -e cur_ksyms_file="include/generated/autoksyms.h" new_ksyms_file="include/generated/autoksyms.h.tmpnew" info() { if [ "$quiet" != "silent_" ]; then printf " %-7s %s\n" "$1" "$2" fi } info "CHK" "$cur_ksyms_file" # Use "make V=1" to debug this script. case "$KBUILD_VERBOSE" in *1*) set -x ;; esac # We need access to CONFIG_ symbols case "${KCONFIG_CONFIG}" in */*) . "${KCONFIG_CONFIG}" ;; *) # Force using a file from the current directory . "./${KCONFIG_CONFIG}" esac # In case it doesn't exist yet... if [ -e "$cur_ksyms_file" ]; then touch "$cur_ksyms_file"; fi # Generate a new ksym list file with symbols needed by the current # set of modules. cat > "$new_ksyms_file" << EOT /* * Automatically generated file; DO NOT EDIT. */ EOT [ "$(ls -A "$MODVERDIR")" ] && sed -ns -e '3{s/ /\n/g;/^$/!p;}' "$MODVERDIR"/*.mod | sort -u | while read sym; do if [ -n "$CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX" ]; then sym="${sym#_}" fi echo "#define __KSYM_${sym} 1" done >> "$new_ksyms_file" # Special case for modversions (see modpost.c) if [ -n "$CONFIG_MODVERSIONS" ]; then echo "#define __KSYM_module_layout 1" >> "$new_ksyms_file" fi # Extract changes between old and new list and touch corresponding # dependency files. changed=$( count=0 sort "$cur_ksyms_file" "$new_ksyms_file" | uniq -u | sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' | tr "A-Z_" "a-z/" | while read sympath; do if [ -z "$sympath" ]; then continue; fi depfile="include/config/ksym/${sympath}.h" mkdir -p "$(dirname "$depfile")" touch "$depfile" echo $((count += 1)) done | tail -1 ) changed=${changed:-0} if [ $changed -gt 0 ]; then # Replace the old list with tne new one old=$(grep -c "^#define __KSYM_" "$cur_ksyms_file" || true) new=$(grep -c "^#define __KSYM_" "$new_ksyms_file" || true) info "KSYMS" "symbols: before=$old, after=$new, changed=$changed" info "UPD" "$cur_ksyms_file" mv -f "$new_ksyms_file" "$cur_ksyms_file" # Then trigger a rebuild of affected source files exec $@ else rm -f "$new_ksyms_file" fi value='search'/>
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authorChristoph Hellwig <hch@lst.de>2017-01-30 13:15:41 +0100
committerBjorn Helgaas <bhelgaas@google.com>2017-02-02 10:35:46 -0600
commitdfef358bd1beb4e7b5c94eca944be9cd23dfc752 (patch)
treeb9a2afb38a4c2ac8ad31f49ec0d71fe9e5b1994c /include/xen/xen-ops.h
parent030305d69fc6963c16003f50d7e8d74b02d0a143 (diff)
PCI/MSI: Don't apply affinity if there aren't enough vectors left
Bart reported a problem wіth an out of bounds access in the low-level IRQ affinity code, which we root caused to the qla2xxx driver assigning all its MSI-X vectors to the pre and post vectors, and not having any left for the actually spread IRQs. Fix this issue by not asking for affinity assignment when there are no vectors to assign left. Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()") Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com Reported-by: Bart Van Assche <bart.vanassche@sandisk.com> Tested-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'include/xen/xen-ops.h')