From dd05add7b2b6004c5fa3a1f276f56d8668f86b65 Mon Sep 17 00:00:00 2001 From: Paulo Alcantara Date: Sat, 26 Sep 2026 19:20:30 -0300 Subject: netfs: zero the tail of a short DIO/unbuffered read The buffered read collector zero-fills the tail of a short read that stops below the inode's i_size (netfs_clear_unread()), so a read that races an extending write still returns the expected number of bytes. The non-buffered collector path does no such thing: it just records how much was transferred. Add the same zero-fill for the non-buffered case, gated on NETFS_SREQ_CLEAR_TAIL: a subreq's source sets that flag when a short result from it is known to be safe to treat as a hole, as opposed to NETFS_SREQ_HIT_EOF, which means the read genuinely ran off the end of the file and should be reported short as-is. Only CLEAR_TAIL should zero-fill here; a real EOF must stay a real short read. No source currently sets CLEAR_TAIL on an unbuffered/DIO subrequest, so this is inert on its own -- a following change teaches cifs to set it in the one case that needs it. Fixes: e2d46f2ec332 ("netfs: Change the read result collector to only use one work item") Reviewed-by: David Howells Reviewed-by: Namjae Jeon Signed-off-by: Paulo Alcantara Cc: Christian Brauner Cc: Matthew Wilcox Cc: Ronnie Sahlberg Cc: Shyam Prasad N Cc: Tom Talpey Cc: Bharath SM Cc: stable@vger.kernel.org --- drivers/perf/Makefile | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 drivers/perf/Makefile (limited to 'drivers/perf/Makefile') diff --git a/drivers/perf/Makefile b/drivers/perf/Makefile new file mode 100644 index 000000000..eb8a022da --- /dev/null +++ b/drivers/perf/Makefile @@ -0,0 +1,39 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_ARM_CCI_PMU) += arm-cci.o +obj-$(CONFIG_ARM_CCN) += arm-ccn.o +obj-$(CONFIG_ARM_CMN) += arm-cmn.o +obj-$(CONFIG_ARM_DSU_PMU) += arm_dsu_pmu.o +obj-$(CONFIG_ARM_NI) += arm-ni.o +obj-$(CONFIG_ARM_PMU) += arm_pmu.o arm_pmu_platform.o +obj-$(CONFIG_ARM_PMU_ACPI) += arm_pmu_acpi.o +obj-$(CONFIG_ARM_PMUV3) += arm_pmuv3.o +obj-$(CONFIG_ARM_V6_PMU) += arm_v6_pmu.o +obj-$(CONFIG_ARM_V7_PMU) += arm_v7_pmu.o +obj-$(CONFIG_ARM_XSCALE_PMU) += arm_xscale_pmu.o +obj-$(CONFIG_ARM_SMMU_V3_PMU) += arm_smmuv3_pmu.o +obj-$(CONFIG_FSL_IMX8_DDR_PMU) += fsl_imx8_ddr_perf.o +obj-$(CONFIG_FSL_IMX9_DDR_PMU) += fsl_imx9_ddr_perf.o +obj-$(CONFIG_FUJITSU_UNCORE_PMU) += fujitsu_uncore_pmu.o +obj-$(CONFIG_HISI_PMU) += hisilicon/ +obj-$(CONFIG_QCOM_L2_PMU) += qcom_l2_pmu.o +obj-$(CONFIG_QCOM_L3_PMU) += qcom_l3_pmu.o +obj-$(CONFIG_RISCV_PMU) += riscv_pmu.o +obj-$(CONFIG_RISCV_PMU_LEGACY) += riscv_pmu_legacy.o +obj-$(CONFIG_RISCV_PMU_SBI) += riscv_pmu_sbi.o +obj-$(CONFIG_STARFIVE_STARLINK_PMU) += starfive_starlink_pmu.o +obj-$(CONFIG_THUNDERX2_PMU) += thunderx2_pmu.o +obj-$(CONFIG_XGENE_PMU) += xgene_pmu.o +obj-$(CONFIG_ARM_SPE_PMU) += arm_spe_pmu.o +obj-$(CONFIG_ARM64_BRBE) += arm_brbe.o +obj-$(CONFIG_ARM_DMC620_PMU) += arm_dmc620_pmu.o +obj-$(CONFIG_MARVELL_CN10K_TAD_PMU) += marvell_cn10k_tad_pmu.o +obj-$(CONFIG_MARVELL_CN10K_DDR_PMU) += marvell_cn10k_ddr_pmu.o +obj-$(CONFIG_MARVELL_PEM_PMU) += marvell_pem_pmu.o +obj-$(CONFIG_APPLE_M1_CPU_PMU) += apple_m1_cpu_pmu.o +obj-$(CONFIG_ALIBABA_UNCORE_DRW_PMU) += alibaba_uncore_drw_pmu.o +obj-$(CONFIG_DWC_PCIE_PMU) += dwc_pcie_pmu.o +obj-$(CONFIG_ARM_CORESIGHT_PMU_ARCH_SYSTEM_PMU) += arm_cspmu/ +obj-$(CONFIG_MESON_DDR_PMU) += amlogic/ +obj-$(CONFIG_CXL_PMU) += cxl_pmu.o +obj-$(CONFIG_NVIDIA_TEGRA410_CMEM_LATENCY_PMU) += nvidia_t410_cmem_latency_pmu.o +obj-$(CONFIG_NVIDIA_TEGRA410_C2C_PMU) += nvidia_t410_c2c_pmu.o -- cgit v1.3.1