Hi all, On Tue, 26 Nov 2013 13:29:46 +1100 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote: > > After merging the block tree, today's linux-next build (arm > multi_v7_defconfig) produced these warnings: > > block/blk-merge.c: In function 'blk_rq_map_sg': > block/blk-merge.c:133:8: warning: 'bvprv.bv_len' may be used uninitialized in this function [-Wuninitialized] > block/blk-merge.c:171:23: note: 'bvprv.bv_len' was declared here > block/blk-merge.c:133:8: warning: 'bvprv.bv_page' may be used uninitialized in this function [-Wuninitialized] > 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 [-Wuninitialized] > block/blk-merge.c:171:23: note: 'bvprv.bv_offset' was declared here > 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 [-Wuninitialized] > 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 [-Wuninitialized] > 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 [-Wuninitialized] > block/blk-merge.c:233:23: note: 'bvprv.bv_page' 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 [-Wuninitialized] > 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 [-Wuninitialized] > 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 [-Wuninitialized] > block/blk-merge.c:89:17: note: 'end_bv.bv_len' was declared here > > arm has its own definition of BIOVEC_PHYS_MERGEABLE() if that is relevant. For an easier test case, the i386 defcongig does this as well. -- Cheers, Stephen Rothwell sfr@xxxxxxxxxxxxxxxx
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