Hi Jens, On Tue, 05 Nov 2013 14:25:00 -0700 Jens Axboe <axboe@xxxxxxxxx> wrote: > > On 11/05/2013 10:38 AM, Stephen Warren wrote: > > I note that compiling next-20131105 generates quite a few warnings re: > > uninitialized variables. Reverting the commit doesn't solve those. > > > >> block/blk-merge.c: In function ‘blk_bio_map_sg’: > >> block/blk-merge.c:133:8: warning: ‘bvprv.bv_len’ may be used uninitialized in this function [-Wmaybe-uninitialized] > >> block/blk-merge.c:233:23: note: ‘bvprv.bv_len’ was declared here > >> block/blk-merge.c:133:8: warning: ‘bvprv.bv_offset’ may be used uninitialized in this function [-Wmaybe-uninitialized] > >> block/blk-merge.c:233:23: note: ‘bvprv.bv_offset’ was declared here > >> block/blk-merge.c:133:8: warning: ‘bvprv.bv_page’ may be used uninitialized in this function [-Wmaybe-uninitialized] > >> block/blk-merge.c:233:23: note: ‘bvprv.bv_page’ was declared here > >> block/blk-merge.c: In function ‘blk_rq_map_sg’: > >> block/blk-merge.c:133:8: warning: ‘bvprv.bv_page’ may be used uninitialized in this function [-Wmaybe-uninitialized] > >> block/blk-merge.c:171:23: note: ‘bvprv.bv_page’ was declared here > >> block/blk-merge.c:133:8: warning: ‘bvprv.bv_offset’ may be used uninitialized in this function [-Wmaybe-uninitialized] > >> block/blk-merge.c:171:23: note: ‘bvprv.bv_offset’ was declared here > >> block/blk-merge.c:133:8: warning: ‘bvprv.bv_len’ may be used uninitialized in this function [-Wmaybe-uninitialized] > >> block/blk-merge.c:171:23: note: ‘bvprv.bv_len’ was declared here > >> block/blk-merge.c: In function ‘attempt_merge’: > >> block/blk-merge.c:108:7: warning: ‘end_bv.bv_offset’ may be used uninitialized in this function [-Wmaybe-uninitialized] > >> block/blk-merge.c:89:17: note: ‘end_bv.bv_offset’ was declared here > >> block/blk-merge.c:108:7: warning: ‘end_bv.bv_page’ may be used uninitialized in this function [-Wmaybe-uninitialized] > >> block/blk-merge.c:89:17: note: ‘end_bv.bv_page’ was declared here > >> block/blk-merge.c:108:7: warning: ‘end_bv.bv_len’ may be used uninitialized in this function [-Wmaybe-uninitialized] > >> block/blk-merge.c:89:17: note: ‘end_bv.bv_len’ was declared here > > Looks like an incomplete merge. The patch to silence those warnings > (which aren't bugs, BTW) is definitely in my for-next branch. I am still getting those warnings in linux-next for various builds (include 1386 defconfig). Any hints would be good. -- Cheers, Stephen Rothwell sfr@xxxxxxxxxxxxxxxx
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