https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715
--- Comment #29 from Martin Liška <marxin at gcc dot gnu.org> ---
I'm got a patch candidate for which I did testing of allmodconfig
configuration.
Sorting all violations against 2KB of stack memory:
Before:
TOTAL warnings: 185
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:5653:1: 23624
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:4518:1: 14144
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3882:1: 11504
lib/atomic64_test.c:250:1: 11192
lib/atomic64_test.c:148:1: 10352
drivers/net/wireless/ralink/rt2x00/rt73usb.c:1294:1: 8680
drivers/net/wireless/ralink/rt2x00/rt2500pci.c:1047:1: 7712
drivers/net/wireless/ralink/rt2x00/rt2500usb.c:891:1: 7592
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:2717:1: 7472
drivers/media/dvb-frontends/stv090x.c:3431:1: 6808
mm/vmscan.c:1497:1: 6688
fs/fscache/stats.c:286:1: 6536
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:8659:1: 6456
drivers/media/dvb-frontends/stv090x.c:3090:1: 5880
lib/test_overflow.c:483:1: 5856
drivers/net/wireless/ralink/rt2x00/rt61pci.c:1647:1: 5792
drivers/media/dvb-frontends/stv090x.c:1595:1: 5304
drivers/scsi/fnic/fnic_trace.c:451:1: 5008
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:2420:1: 4912
drivers/media/dvb-frontends/stv090x.c:4265:1: 4840
net/wireless/nl80211.c:2102:1: 4656
drivers/net/wireless/ralink/rt2x00/rt61pci.c:2631:1: 4416
drivers/net/wireless/realtek/rtl818x/rtl8180/rtl8225se.c:431:1: 4376
drivers/scsi/lpfc/lpfc_attr.c:510:1: 4272
fs/btrfs/relocation.c:1149:1: 4224
drivers/staging/rtlwifi/btcoexist/halbtc8822b2ant.c:3545:1: 4216
drivers/acpi/nfit/core.c:3213:1: 4176
drivers/net/wireless/ralink/rt2x00/rt2400pci.c:909:1: 4128
drivers/net/wireless/ralink/rt2x00/rt61pci.c:1963:1: 4032
drivers/net/wireless/ralink/rt2x00/rt73usb.c:1853:1: 4000
drivers/net/wireless/ralink/rt2x00/rt61pci.c:2497:1: 3968
fs/jbd2/commit.c:1129:1: 3920
drivers/scsi/lpfc/lpfc_debugfs.c:978:1: 3896
fs/ocfs2/super.c:1234:1: 3856
drivers/media/dvb-frontends/cxd2841er.c:3302:1: 3816
drivers/media/dvb-frontends/stv0910.c:1547:1: 3808
drivers/media/dvb-frontends/stv0367.c:2607:1: 3744
net/core/ethtool.c:2872:1: 3584
drivers/net/wireless/ralink/rt2x00/rt73usb.c:1962:1: 3472
kernel/rcu/tree.c:2239:1: 3448
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16563:1: 3424
fs/ocfs2/namei.c:1691:1: 3400
drivers/net/wireless/ralink/rt2x00/rt73usb.c:1527:1: 3392
mm/khugepaged.c:1565:1: 3296
drivers/media/dvb-frontends/stv090x.c:1952:1: 3272
drivers/staging/rtl8723bs/hal/HalBtc8723b2Ant.c:2924:1: 3208
kernel/fork.c:2104:1: 3192
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16905:1: 3160
drivers/media/dvb-frontends/cxd2841er.c:3501:1: 3152
drivers/scsi/snic/snic_debugfs.c:355:1: 3064
fs/ocfs2/aops.c:1906:1: 3032
drivers/media/dvb-frontends/stv090x.c:1854:1: 3008
drivers/net/wireless/ralink/rt2x00/rt2400pci.c:1171:1: 2992
drivers/net/wireless/ralink/rt2x00/rt2400pci.c:399:1: 2984
drivers/net/wireless/ralink/rt2x00/rt2500pci.c:405:1: 2984
drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1434:1: 2976
arch/x86/kernel/cpu/mshyperv.c:307:1: 2960
net/sched/cls_flower.c:1286:1: 2936
drivers/isdn/hardware/avm/b1.c:637:1: 2936
fs/f2fs/segment.c:4182:1: 2912
drivers/scsi/mpt3sas/mpt3sas_scsih.c:9467:1: 2904
net/rxrpc/call_event.c:459:1: 2896
drivers/rapidio/devices/rio_mport_cdev.c:2129:1: 2872
drivers/net/wireless/ralink/rt2x00/rt61pci.c:1503:1: 2848
fs/nfs/write.c:1357:1: 2840
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3999:1: 2840
fs/nfs/pnfs.c:2023:1: 2832
net/caif/cfctrl.c:549:1: 2824
drivers/block/drbd/drbd_req.c:1447:1: 2800
mm/gup.c:1757:1: 2792
fs/ocfs2/xattr.c:3686:1: 2784
drivers/media/dvb-frontends/cxd2841er.c:3639:1: 2784
fs/ocfs2/super.c:2355:1: 2768
net/sctp/socket.c:7632:1: 2768
drivers/net/wireless/ralink/rt2x00/rt73usb.c:734:1: 2760
drivers/net/ethernet/rocker/rocker_ofdpa.c:563:1: 2760
net/rxrpc/input.c:1362:1: 2752
drivers/net/wireless/ralink/rt2x00/rt2500pci.c:1323:1: 2752
drivers/media/dvb-frontends/cxd2841er.c:3132:1: 2744
fs/btrfs/disk-io.c:3341:1: 2720
drivers/iio/common/ssp_sensors/ssp_spi.c:449:1: 2720
fs/f2fs/gc.c:825:1: 2704
fs/xfs/libxfs/xfs_rmap.c:1348:1: 2696
fs/ocfs2/dlm/dlmmaster.c:2767:1: 2664
lib/test_overflow.c:588:1: 2648
net/core/rtnetlink.c:1700:1: 2648
drivers/gpu/drm/tinydrm/ili9225.c:260:1: 2616
drivers/net/wireless/ralink/rt2x00/rt2500usb.c:591:1: 2616
fs/f2fs/gc.c:1250:1: 2608
fs/nfsd/export.c:652:1: 2608
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:6805:1: 2608
mm/rmap.c:1627:1: 2600
net/bridge/br_netlink.c:1481:1: 2592
drivers/media/tuners/r820t.c:1327:1: 2576
drivers/media/dvb-frontends/stv090x.c:2069:1: 2544
drivers/scsi/qla2xxx/qla_isr.c:1257:1: 2544
fs/btrfs/tree-log.c:3185:1: 2528
drivers/md/md.c:8645:1: 2528
drivers/media/dvb-frontends/stv090x.c:2508:1: 2528
lib/rbtree.c:481:1: 2520
lib/rbtree.c:463:1: 2520
mm/page_alloc.c:5041:1: 2512
mm/migrate.c:576:1: 2512
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:4834:1: 2512
net/rxrpc/recvmsg.c:608:1: 2488
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3181:1: 2488
drivers/firmware/efi/test/efi_test.c:688:1: 2480
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:836:1: 2480
drivers/media/pci/solo6x10/solo6x10-disp.c:289:1: 2472
net/mac80211/util.c:2263:1: 2464
drivers/gpu/drm/nouveau/nvkm/subdev/i2c/anx9805.c:189:1: 2464
mm/ksm.c:2180:1: 2456
fs/ocfs2/dlm/dlmrecovery.c:752:1: 2456
drivers/block/drbd/drbd_req.c:1624:1: 2448
drivers/input/mouse/cyapa_gen5.c:2434:1: 2440
drivers/net/macsec.c:2597:1: 2432
drivers/scsi/fnic/fnic_fcs.c:918:1: 2424
net/rxrpc/rxkad.c:399:1: 2400
fs/nilfs2/segment.c:1530:1: 2392
fs/cachefiles/rdwr.c:674:1: 2384
mm/memory-failure.c:1925:1: 2384
fs/userfaultfd.c:1843:1: 2384
net/wireless/nl80211.c:4796:1: 2376
drivers/scsi/lpfc/lpfc_nvmet.c:1462:1: 2376
fs/ocfs2/namei.c:2064:1: 2368
drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1122:1: 2368
drivers/infiniband/hw/hfi1/rc.c:2482:1: 2360
fs/ocfs2/dlm/dlmmaster.c:1013:1: 2352
drivers/media/dvb-frontends/cxd2841er.c:3211:1: 2344
net/wireless/nl80211.c:6130:1: 2328
drivers/input/touchscreen/ads7846.c:1459:1: 2312
mm/swapfile.c:2236:1: 2304
mm/migrate.c:726:1: 2304
fs/ocfs2/dir.c:3107:1: 2304
sound/soc/intel/haswell/sst-haswell-ipc.c:640:1: 2296
net/smc/smc_cdc.c:323:1: 2296
drivers/media/i2c/saa6752hs.c:555:1: 2288
net/wireless/nl80211.c:1586:1: 2272
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:26034:1: 2272
mm/shmem.c:1937:1: 2256
fs/xfs/xfs_log_recover.c:2008:1: 2256
fs/f2fs/file.c:1189:1: 2248
net/ieee802154/nl802154.c:551:1: 2248
drivers/block/drbd/drbd_state.c:2039:1: 2240
fs/ocfs2/namei.c:503:1: 2232
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:1681:1: 2224
mm/memory-failure.c:1419:1: 2216
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:7378:1: 2216
mm/madvise.c:441:1: 2208
drivers/net/virtio_net.c:984:1: 2200
drivers/media/dvb-frontends/stv0910.c:1613:1: 2192
drivers/media/i2c/cx25840/cx25840-core.c:460:1: 2192
drivers/net/wireless/ath/ath9k/ar9003_eeprom.c:5138:1: 2176
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c:830:1: 2168
drivers/isdn/hardware/eicon/message.c:5985:1: 2160
drivers/media/pci/saa7134/saa7134-cards.c:8068:1: 2160
arch/x86/kvm/emulate.c:2562:1: 2152
drivers/net/wireless/ath/ath9k/ar9003_mac.c:158:1: 2152
fs/xfs/libxfs/xfs_alloc.c:1383:1: 2144
lib/test_overflow.c:606:1: 2128
drivers/i2c/busses/i2c-fsi.c:638:1: 2128
arch/x86/kvm/x86.c:4059:1: 2120
fs/btrfs/scrub.c:3394:1: 2112
block/blk-cgroup.c:1026:1: 2112
drivers/staging/erofs/unzip_vle.c:999:1: 2112
drivers/media/dvb-frontends/stv090x.c:4580:1: 2104
drivers/media/dvb-frontends/stv090x.c:2137:1: 2104
drivers/net/ethernet/intel/igb/igb_ethtool.c:2079:1: 2104
drivers/scsi/qla4xxx/ql4_nx.c:3218:1: 2104
fs/ntfs/mft.c:2764:1: 2096
net/wireless/scan.c:1059:1: 2096
drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c:4349:1: 2096
drivers/net/ethernet/broadcom/cnic.c:2725:1: 2096
net/rxrpc/rxkad.c:499:1: 2088
drivers/net/bonding/bond_netlink.c:677:1: 2088
mm/shmem.c:987:1: 2080
fs/f2fs/debug.c:130:1: 2080
drivers/gpu/drm/nouveau/nvkm/subdev/i2c/anx9805.c:95:1: 2080
drivers/media/dvb-frontends/stv090x.c:1207:1: 2080
drivers/media/dvb-frontends/stv090x.c:1164:1: 2080
drivers/staging/pi433/rf69.c:613:1: 2080
net/mac802154/iface.c:201:1: 2072
fs/ocfs2/dlm/dlmmaster.c:2050:1: 2064
drivers/media/dvb-frontends/stv090x.c:4774:1: 2064
mm/compaction.c:959:1: 2056
after:
TOTAL warnings: 43
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:5653:1: 11880
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:4518:1: 7264
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:3882:1: 5840
lib/atomic64_test.c:250:1: 5656
lib/atomic64_test.c:148:1: 5232
drivers/net/wireless/ralink/rt2x00/rt73usb.c:1294:1: 4392
drivers/net/wireless/ralink/rt2x00/rt2500pci.c:1047:1: 3904
drivers/net/wireless/ralink/rt2x00/rt2500usb.c:891:1: 3848
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:2717:1: 3792
drivers/media/dvb-frontends/stv090x.c:3431:1: 3512
mm/vmscan.c:1497:1: 3488
fs/fscache/stats.c:286:1: 3336
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:8659:1: 3288
drivers/media/dvb-frontends/stv090x.c:3090:1: 3032
lib/test_overflow.c:483:1: 2976
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16563:1: 2976
drivers/net/wireless/ralink/rt2x00/rt61pci.c:1647:1: 2944
drivers/media/dvb-frontends/stv090x.c:1595:1: 2712
drivers/scsi/fnic/fnic_trace.c:451:1: 2640
drivers/media/dvb-frontends/stv0910.c:1547:1: 2624
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16905:1: 2616
net/wireless/nl80211.c:2102:1: 2544
drivers/net/wireless/ralink/rt2x00/rt2800lib.c:2420:1: 2512
net/core/ethtool.c:2872:1: 2496
fs/jbd2/commit.c:1129:1: 2480
drivers/media/dvb-frontends/stv090x.c:4265:1: 2472
net/sched/cls_flower.c:1286:1: 2392
fs/btrfs/relocation.c:1149:1: 2368
drivers/acpi/nfit/core.c:3213:1: 2352
drivers/scsi/lpfc/lpfc_attr.c:510:1: 2320
drivers/net/wireless/ralink/rt2x00/rt61pci.c:2631:1: 2272
drivers/net/wireless/realtek/rtl818x/rtl8180/rtl8225se.c:431:1: 2264
drivers/iio/common/ssp_sensors/ssp_spi.c:449:1: 2176
drivers/staging/rtlwifi/btcoexist/halbtc8822b2ant.c:3545:1: 2168
fs/ocfs2/super.c:1234:1: 2160
fs/ocfs2/namei.c:1691:1: 2152
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:26034:1: 2144
kernel/rcu/tree.c:2239:1: 2136
drivers/net/wireless/ralink/rt2x00/rt2400pci.c:909:1: 2112
drivers/net/wireless/ralink/rt2x00/rt61pci.c:1963:1: 2080
drivers/net/wireless/ralink/rt2x00/rt61pci.c:2497:1: 2080
drivers/scsi/lpfc/lpfc_debugfs.c:978:1: 2072
drivers/scsi/mpt3sas/mpt3sas_scsih.c:9467:1: 2072
Which is very promising improvement I would say.
