• Arnd Bergmann's avatar
    block: autoconvert trivial BKL users to private mutex · 2a48fc0a
    Arnd Bergmann authored
    The block device drivers have all gained new lock_kernel
    calls from a recent pushdown, and some of the drivers
    were already using the BKL before.
    
    This turns the BKL into a set of per-driver mutexes.
    Still need to check whether this is safe to do.
    
    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: 's avatarArnd Bergmann <arnd@arndb.de>
    2a48fc0a