kernel-ark/drivers/staging/vme
Arnd Bergmann 8e2394a981 Staging: autoconvert trivial BKL users to private mutex
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-22 11:10:29 -07:00
..
boards Staging: remove unused #include <linux/version.h> 2010-05-11 11:35:36 -07:00
bridges Staging: vme: vme_ca91cx42: remove casts from void* 2010-07-08 13:54:02 -07:00
devices Staging: autoconvert trivial BKL users to private mutex 2010-07-22 11:10:29 -07:00
Kconfig Staging: vme: VMIVME-7805 board support 2010-03-03 16:43:02 -08:00
Makefile Staging: vme: VMIVME-7805 board support 2010-03-03 16:43:02 -08:00
TODO Staging: vme: Add ca91cx42 rmw support 2010-03-03 16:43:01 -08:00
vme_api.txt Staging: vme: Attribute Testing For Dma Request 2010-03-03 16:43:00 -08:00
vme_bridge.h Staging: vme: Remove legacy unsupported code 2010-03-03 16:43:01 -08:00
vme.c Staging: vme: declare vme_calc_slot() as static 2010-05-11 11:35:53 -07:00
vme.h Staging: vme: Attribute Testing For Dma Request 2010-03-03 16:43:00 -08:00