forked from Minki/linux
d851b6e04e
All these files use the big kernel lock in a trivial
way to serialize their private file operations,
typically resulting from an earlier semi-automatic
pushdown from VFS.
None of these drivers appears to want to lock against
other code, and they all use the BKL as the top-level
lock in their file operations, meaning that there
is no lock-order inversion problem.
Consequently, we can remove the BKL completely,
replacing it with a per-file mutex in every case.
Using a scripted approach means we can avoid
typos.
file=$1
name=$2
if grep -q lock_kernel ${file} ; then
if grep -q 'include.*linux.mutex.h' ${file} ; then
sed -i '/include.*<linux\/smp_lock.h>/d' ${file}
else
sed -i 's/include.*<linux\/smp_lock.h>.*$/include <linux\/mutex.h>/g' ${file}
fi
sed -i ${file} \
-e "/^#include.*linux.mutex.h/,$ {
1,/^\(static\|int\|long\)/ {
/^\(static\|int\|long\)/istatic DEFINE_MUTEX(${name}_mutex);
} }" \
-e "s/\(un\)*lock_kernel\>[ ]*()/mutex_\1lock(\&${name}_mutex)/g" \
-e '/[ ]*cycle_kernel_lock();/d'
else
sed -i -e '/include.*\<smp_lock.h\>/d' ${file} \
-e '/cycle_kernel_lock()/d'
fi
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org
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||
|---|---|---|
| .. | ||
| adb-iop.c | ||
| adb.c | ||
| adbhid.c | ||
| ans-lcd.c | ||
| ans-lcd.h | ||
| apm_emu.c | ||
| Kconfig | ||
| mac_hid.c | ||
| macio_asic.c | ||
| macio_sysfs.c | ||
| macio-adb.c | ||
| Makefile | ||
| mediabay.c | ||
| nvram.c | ||
| rack-meter.c | ||
| smu.c | ||
| therm_adt746x.c | ||
| therm_pm72.c | ||
| therm_pm72.h | ||
| therm_windtunnel.c | ||
| via-cuda.c | ||
| via-macii.c | ||
| via-maciisi.c | ||
| via-pmu68k.c | ||
| via-pmu-backlight.c | ||
| via-pmu-event.c | ||
| via-pmu-event.h | ||
| via-pmu-led.c | ||
| via-pmu.c | ||
| windfarm_core.c | ||
| windfarm_cpufreq_clamp.c | ||
| windfarm_lm75_sensor.c | ||
| windfarm_max6690_sensor.c | ||
| windfarm_pid.c | ||
| windfarm_pid.h | ||
| windfarm_pm81.c | ||
| windfarm_pm91.c | ||
| windfarm_pm112.c | ||
| windfarm_pm121.c | ||
| windfarm_smu_controls.c | ||
| windfarm_smu_sat.c | ||
| windfarm_smu_sensors.c | ||
| windfarm.h | ||