Satyam Sharma wrote:
drivers/md/dm-exception-store.c: In function ‘persistent_read_metadata’: drivers/md/dm-exception-store.c:452: warning: ‘new_snapshot’ may be used uninitialized in this function drivers/md/dm-ioctl.c: In function ‘ctl_ioctl’: drivers/md/dm-ioctl.c:1407: warning: ‘param’ may be used uninitialized in this function [ For these, I'd like to especially add -- shame on you, gcc! ] drivers/md/dm-table.c: In function ‘dm_get_device’: drivers/md/dm-table.c:472: warning: ‘dev’ may be used uninitialized in this function are all verified to be bogus warnings. Let's shut them up. --- drivers/md/dm-exception-store.c | 3 ++- drivers/md/dm-ioctl.c | 2 +- drivers/md/dm-table.c | 2 +- 3 file changed, 4 insertions(+), 3 deletion(-)
same comment as with the last uninit'd var patch: these markers should be used sparingly. Try it on multiple compiler versions, see if it's a new behavior.
Quite realistically, you might actually be finding gcc bugs, implying the proper path is to file a gcc bug report (and they are _very_ diligent about handling these, its impressive) rather than to patch the Linux kernel.
Overall, for any uninitialized_var() patch, we need more info on platform/compiler version/analysis methods/etc.
Jeff -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
