diff options
author | Arnd Bergmann <arnd@arndb.de> | 2010-06-02 16:28:52 +0400 |
---|---|---|
committer | Arnd Bergmann <arnd@arndb.de> | 2010-09-15 23:00:45 +0400 |
commit | c45d15d24eb2b49bf734e1e5e7e103befb76b19b (patch) | |
tree | dd768c089fd3393e8fa2c4f4fb50cedb1044037d /drivers/scsi/megaraid/megaraid_mm.h | |
parent | 49553c2ef88749dd502687f4eb9c258bb10a4f44 (diff) | |
download | linux-c45d15d24eb2b49bf734e1e5e7e103befb76b19b.tar.xz |
scsi: 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>
Cc: linux-scsi@vger.kernel.org
Cc: "James E.J. Bottomley" <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/megaraid/megaraid_mm.h')
0 files changed, 0 insertions, 0 deletions