On Thu, 2014-02-20 at 09:07 +0100, Paul Bolle wrote: > Building target_core_alua.o triggers a GCC warning: > drivers/target/target_core_alua.c: In function ‘target_alua_state_check’: > drivers/target/target_core_alua.c:773:18: warning: ‘alua_ascq’ may be used uninitialized in this function [-Wmaybe-uninitialized] > cmd->scsi_ascq = alua_ascq; > ^ > > This is a false positive. A little trial and error shows it is > apparently caused by core_alua_state_lba_dependent(). It must be hard > for GCC to track the branches of a switch statement, inside a > list_for_each_entry loop, inside a while loop. > > But if we add a small (inline) helper function we can reorganize the > code a bit. That also allows to drop alua_ascq which, obviously, gets > rid of this warning. > > Signed-off-by: Paul Bolle <pebolle@xxxxxxxxxx> > --- > v2: Make core_alua_state_nonoptimized() return void, as Geert > suggested. > > Also keep core_alua_state_lba_dependent() inline. Setting that function > noinline was just a leftover from the trial and error fase, and isn't > needed to make the warning go away. Ie, I was sloppy in v1! > > Still compile tested only. > > drivers/target/target_core_alua.c | 95 ++++++++++++++++++--------------------- > 1 file changed, 44 insertions(+), 51 deletions(-) > Applied to target-pending/for-next. Thanks Paul! --nab -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
