Buildresult: linus/multi_v7_defconfig/arm-gcc4.6 built on Dec 8 2019, 06:37

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Status:	OK
Date/Time:	Dec 8 2019, 06:37
Duration:	0:02:49.294435
Builder:	ka3
Revision:	pipe: fix poll/select race introduced by the pipe rework (`ad910e36da4ca3a1bd436989f632d062dda0c921)`
Target:	linus/multi_v7_defconfig/arm-gcc4.6
Branch:	linus
Compiler:	arm-gcc4.6 (arm-unknown-linux-gnueabi-gcc (GCC) 4.6.3 / GNU ld (GNU Binutils) 2.22)
Config:	multi_v7_defconfig (download)
Log:	Download original Possible warnings (23) kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] fs/ext4/extents.c:5054:23: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] sound/hda/hdac_regmap.c:284:16: warning: 'err' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:2591:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:1852:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] crypto/sha512_generic.c:149:1: warning: the frame size of 1184 bytes is larger than 1024 bytes [-Wframe-larger-than=] net/core/devlink.c:4613:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] drivers/i2c/busses/i2c-sh_mobile.c:399:26: warning: 'data' may be used uninitialized in this function [-Wuninitialized] drivers/clk/sunxi-ng/ccu_mux.c:150:22: warning: 'best_parent' may be used uninitialized in this function [-Wuninitialized] drivers/clk/ti/clk.c:579:2: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] net/mac80211/mlme.c:1576:3: warning: 'pwr_level_cisco' may be used uninitialized in this function [-Wuninitialized] drivers/soc/qcom/wcnss_ctrl.c:299:5: warning: 'expect_cbc' may be used uninitialized in this function [-Wuninitialized] drivers/net/ethernet/marvell/mv643xx_eth.c:2971:20: warning: 'err' may be used uninitialized in this function [-Wuninitialized] drivers/gpu/drm/msm/disp/mdp5/mdp5.xml.h:1036:16: warning: 'uv_filter' may be used uninitialized in this function [-Wuninitialized] drivers/gpu/drm/sun4i/sun4i_tcon.c:1179:35: warning: 'has_lvds_alt' may be used uninitialized in this function [-Wuninitialized] drivers/gpu/drm/tegra/dpaux.c:787:6: warning: 'status' may be used uninitialized in this function [-Wuninitialized] drivers/gpu/drm/tegra/dpaux.c:751:6: warning: 'status' may be used uninitialized in this function [-Wuninitialized] drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:1022:12: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c:722:8: warning: missing braces around initializer [-Wmissing-braces] drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c:722:8: warning: (near initialization for 'opts.mipi_dphy') [-Wmissing-braces] drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c:104:1: warning: 'inst' may be used uninitialized in this function [-Wuninitialized] drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c:104:1: warning: 'type' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify ad910e36da4ca3a1bd436989f632d062dda0c921^{commit} ad910e36da4ca3a1bd436989f632d062dda0c921 already have revision, skipping fetch # git checkout -q -f -B kisskb ad910e36da4ca3a1bd436989f632d062dda0c921 # git clean -qxdf # < git log -1 # commit ad910e36da4ca3a1bd436989f632d062dda0c921 # Author: Linus Torvalds <torvalds@linux-foundation.org> # Date: Sat Dec 7 10:41:17 2019 -0800 # # pipe: fix poll/select race introduced by the pipe rework # # The kernel wait queues have a basic rule to them: you add yourself to # the wait-queue first, and then you check the things that you're going to # wait on. That avoids the races with the event you're waiting for. # # The same goes for poll/select logic: the "poll_wait()" goes first, and # then you check the things you're polling for. # # Of course, if you use locking, the ordering doesn't matter since the # lock will serialize with anything that changes the state you're looking # at. That's not the case here, though. # # So move the poll_wait() first in pipe_poll(), before you start looking # at the pipe state. # # Fixes: 8cefc107ca54 ("pipe: Use head and tail pointers for the ring, not cursor and length") # Cc: David Howells <dhowells@redhat.com> # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-ld --version # < git log --format=%s --max-count=1 ad910e36da4ca3a1bd436989f632d062dda0c921 # < make -s -j 80 ARCH=arm O=/kisskb/build/linus_multi_v7_defconfig_arm CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi- multi_v7_defconfig # make -s -j 80 ARCH=arm O=/kisskb/build/linus_multi_v7_defconfig_arm CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi- /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:338:21: note: 'pdeo' was declared here /kisskb/src/fs/ext4/extents.c: In function 'ext4_convert_unwritten_io_end_vec': /kisskb/src/fs/ext4/extents.c:5054:23: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/hda/hdac_regmap.c: In function 'hda_reg_write': /kisskb/src/sound/hda/hdac_regmap.c:284:16: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read': /kisskb/src/drivers/base/regmap/regmap.c:2591:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function '_regmap_raw_write': /kisskb/src/drivers/base/regmap/regmap.c:1852:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/crypto/sha512_generic.c: In function 'sha512_transform': /kisskb/src/crypto/sha512_generic.c:149:1: warning: the frame size of 1184 bytes is larger than 1024 bytes [-Wframe-larger-than=] /kisskb/src/net/core/devlink.c: In function 'devlink_fmsg_prepare_skb': /kisskb/src/net/core/devlink.c:4613:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c: In function 'sh_mobile_i2c_isr': /kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c:399:26: warning: 'data' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c:372:16: note: 'data' was declared here /kisskb/src/drivers/clk/sunxi-ng/ccu_mux.c: In function 'ccu_mux_helper_determine_rate': /kisskb/src/drivers/clk/sunxi-ng/ccu_mux.c:150:22: warning: 'best_parent' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/clk/ti/clk.c: In function 'omap2_clk_for_each': /kisskb/src/drivers/clk/ti/clk.c:579:2: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/mac80211/mlme.c: In function 'ieee80211_rx_mgmt_beacon': /kisskb/src/net/mac80211/mlme.c:1576:3: warning: 'pwr_level_cisco' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/mac80211/mlme.c:1533:6: note: 'pwr_level_cisco' was declared here /kisskb/src/drivers/soc/qcom/wcnss_ctrl.c: In function 'wcnss_async_probe': /kisskb/src/drivers/soc/qcom/wcnss_ctrl.c:299:5: warning: 'expect_cbc' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/ethernet/marvell/mv643xx_eth.c: In function 'get_phy_mode': /kisskb/src/drivers/net/ethernet/marvell/mv643xx_eth.c:2971:20: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c: In function 'get_scale_config': /kisskb/src/drivers/gpu/drm/msm/disp/mdp5/mdp5.xml.h:1036:16: warning: 'uv_filter' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c:697:22: note: 'uv_filter' was declared here /kisskb/src/drivers/gpu/drm/sun4i/sun4i_tcon.c: In function 'sun4i_tcon_bind': /kisskb/src/drivers/gpu/drm/sun4i/sun4i_tcon.c:1179:35: warning: 'has_lvds_alt' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/tegra/dpaux.c: In function 'drm_dp_aux_detach': /kisskb/src/drivers/gpu/drm/tegra/dpaux.c:787:6: warning: 'status' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/tegra/dpaux.c: In function 'drm_dp_aux_attach': /kisskb/src/drivers/gpu/drm/tegra/dpaux.c:751:6: warning: 'status' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c: In function 'stmmac_open': /kisskb/src/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:1022:12: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:1012:6: note: 'ret' was declared here /kisskb/src/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c: In function 'sun6i_dsi_encoder_enable': /kisskb/src/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c:722:8: warning: missing braces around initializer [-Wmissing-braces] /kisskb/src/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c:722:8: warning: (near initialization for 'opts.mipi_dphy') [-Wmissing-braces] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c: In function 'gk104_top_oneinit': /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c:104:1: warning: 'inst' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c:104:1: warning: 'type' may be used uninitialized in this function [-Wuninitialized] Completed OK # rm -rf /kisskb/build/linus_multi_v7_defconfig_arm # Build took: 0:02:49.294435

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