1. 06 Apr, 2023 3 commits
    • Thomas Zimmermann's avatar
      drm/tegra: Implement fbdev emulation as in-kernel client · 71ec16f4
      Thomas Zimmermann authored
      Move code from ad-hoc fbdev callbacks into DRM client functions
      and remove the old callbacks. The functions instruct the client
      to poll for changed output or restore the display. The DRM core
      calls both, the old callbacks and the new client helpers, from
      the same places. The new functions perform the same operation as
      before, so there's no change in functionality.
      
      Replace all code that initializes or releases fbdev emulation
      throughout the driver. Instead initialize the fbdev client by a
      single call to tegra_fbdev_setup() after tegra has registered
      its DRM device. As in most drivers, tegra's fbdev emulation now
      acts like a regular DRM client.
      
      The fbdev client setup consists of the initial preparation and the
      hot-plugging of the display. The latter creates the fbdev device
      and sets up the fbdev framebuffer. The setup performs display
      hot-plugging once. If no display can be detected, DRM probe helpers
      re-run the detection on each hotplug event.
      
      A call to drm_dev_unregister() releases the client automatically.
      No further action is required within tegra. If the fbdev
      framebuffer has been fully set up, struct fb_ops.fb_destroy
      implements the release. For partially initialized emulation, the
      fbdev client reverts the initial setup.
      Signed-off-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
      Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
      71ec16f4
    • Thomas Zimmermann's avatar
      drm/tegra: Initialize fbdev DRM client · 25dda38e
      Thomas Zimmermann authored
      Initialize the fbdev client in the fbdev code with empty helper
      functions. Also clean up the client. The helpers will later
      implement various functionality of the DRM client. No functional
      changes.
      Signed-off-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
      Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
      25dda38e
    • Thomas Zimmermann's avatar
      drm/tegra: Hide fbdev support behind config option · 1ac45068
      Thomas Zimmermann authored
      Only build tegra's fbdev emulation if CONFIG_DRM_FBDEV_EMULATION
      has been enabled. As part of this change, move the code into its
      own source file. No functional changes.
      Signed-off-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
      Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
      1ac45068
  2. 05 Apr, 2023 5 commits
  3. 04 Apr, 2023 24 commits
  4. 19 Mar, 2023 8 commits
    • Linus Torvalds's avatar
      Linux 6.3-rc3 · e8d018dd
      Linus Torvalds authored
      e8d018dd
    • Linus Torvalds's avatar
      Merge tag 'trace-v6.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace · eaba52d6
      Linus Torvalds authored
      Pull tracing fixes from Steven Rostedt:
      
       - Fix setting affinity of hwlat threads in containers
      
         Using sched_set_affinity() has unwanted side effects when being
         called within a container. Use set_cpus_allowed_ptr() instead
      
       - Fix per cpu thread management of the hwlat tracer:
          - Do not start per_cpu threads if one is already running for the CPU
          - When starting per_cpu threads, do not clear the kthread variable
            as it may already be set to running per cpu threads
      
       - Fix return value for test_gen_kprobe_cmd()
      
         On error the return value was overwritten by being set to the result
         of the call from kprobe_event_delete(), which would likely succeed,
         and thus have the function return success
      
       - Fix splice() reads from the trace file that was broken by commit
         36e2c742 ("fs: don't allow splice read/write without explicit
         ops")
      
       - Remove obsolete and confusing comment in ring_buffer.c
      
         The original design of the ring buffer used struct page flags for
         tricks to optimize, which was shortly removed due to them being
         tricks. But a comment for those tricks remained
      
       - Set local functions and variables to static
      
      * tag 'trace-v6.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
        tracing/hwlat: Replace sched_setaffinity with set_cpus_allowed_ptr
        ring-buffer: remove obsolete comment for free_buffer_page()
        tracing: Make splice_read available again
        ftrace: Set direct_ops storage-class-specifier to static
        trace/hwlat: Do not start per-cpu thread if it is already running
        trace/hwlat: Do not wipe the contents of per-cpu thread data
        tracing/osnoise: set several trace_osnoise.c variables storage-class-specifier to static
        tracing: Fix wrong return in kprobe_event_gen_test.c
      eaba52d6
    • Costa Shulyupin's avatar
      tracing/hwlat: Replace sched_setaffinity with set_cpus_allowed_ptr · 71c7a304
      Costa Shulyupin authored
      There is a problem with the behavior of hwlat in a container,
      resulting in incorrect output. A warning message is generated:
      "cpumask changed while in round-robin mode, switching to mode none",
      and the tracing_cpumask is ignored. This issue arises because
      the kernel thread, hwlatd, is not a part of the container, and
      the function sched_setaffinity is unable to locate it using its PID.
      Additionally, the task_struct of hwlatd is already known.
      Ultimately, the function set_cpus_allowed_ptr achieves
      the same outcome as sched_setaffinity, but employs task_struct
      instead of PID.
      
      Test case:
      
        # cd /sys/kernel/tracing
        # echo 0 > tracing_on
        # echo round-robin > hwlat_detector/mode
        # echo hwlat > current_tracer
        # unshare --fork --pid bash -c 'echo 1 > tracing_on'
        # dmesg -c
      
      Actual behavior:
      
      [573502.809060] hwlat_detector: cpumask changed while in round-robin mode, switching to mode none
      
      Link: https://lore.kernel.org/linux-trace-kernel/20230316144535.1004952-1-costa.shul@redhat.com
      
      Cc: Masami Hiramatsu <mhiramat@kernel.org>
      Fixes: 0330f7aa ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs")
      Signed-off-by: default avatarCosta Shulyupin <costa.shul@redhat.com>
      Acked-by: default avatarDaniel Bristot de Oliveira <bristot@kernel.org>
      Signed-off-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
      71c7a304
    • Vlastimil Babka's avatar
      ring-buffer: remove obsolete comment for free_buffer_page() · a98151ad
      Vlastimil Babka authored
      The comment refers to mm/slob.c which is being removed. It comes from
      commit ed56829c ("ring_buffer: reset buffer page when freeing") and
      according to Steven the borrowed code was a page mapcount and mapping
      reset, which was later removed by commit e4c2ce82 ("ring_buffer:
      allocate buffer page pointer"). Thus the comment is not accurate anyway,
      remove it.
      
      Link: https://lore.kernel.org/linux-trace-kernel/20230315142446.27040-1-vbabka@suse.cz
      
      Cc: Masami Hiramatsu <mhiramat@kernel.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      Reported-by: default avatarMike Rapoport <mike.rapoport@gmail.com>
      Suggested-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
      Fixes: e4c2ce82 ("ring_buffer: allocate buffer page pointer")
      Signed-off-by: default avatarVlastimil Babka <vbabka@suse.cz>
      Reviewed-by: default avatarMukesh Ojha <quic_mojha@quicinc.com>
      Signed-off-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
      a98151ad
    • Sung-hun Kim's avatar
      tracing: Make splice_read available again · e400be67
      Sung-hun Kim authored
      Since the commit 36e2c742 ("fs: don't allow splice read/write
      without explicit ops") is applied to the kernel, splice() and
      sendfile() calls on the trace file (/sys/kernel/debug/tracing
      /trace) return EINVAL.
      
      This patch restores these system calls by initializing splice_read
      in file_operations of the trace file. This patch only enables such
      functionalities for the read case.
      
      Link: https://lore.kernel.org/linux-trace-kernel/20230314013707.28814-1-sfoon.kim@samsung.com
      
      Cc: stable@vger.kernel.org
      Fixes: 36e2c742 ("fs: don't allow splice read/write without explicit ops")
      Signed-off-by: default avatarSung-hun Kim <sfoon.kim@samsung.com>
      Signed-off-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
      e400be67
    • Linus Torvalds's avatar
      Merge tag 'tty-6.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 5cdfdd6d
      Linus Torvalds authored
      Pull tty/serial driver fixes from Greg KH:
       "Here are some small tty and serial driver fixes for 6.3-rc3 to resolve
        some reported issues.
      
        They include:
      
         - 8250 driver Kconfig issue pointed out by you that showed up in -rc1
      
         - qcom-geni serial driver fixes
      
         - various 8250 driver fixes for reported problems
      
         - fsl_lpuart driver fixes
      
         - serdev fix for regression in -rc1
      
         - vt.c bugfix
      
        All have been in linux-next for over a week with no reported problems"
      
      * tag 'tty-6.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        tty: vt: protect KD_FONT_OP_GET_TALL from unbound access
        serial: qcom-geni: drop bogus uart_write_wakeup()
        serial: qcom-geni: fix mapping of empty DMA buffer
        serial: qcom-geni: fix DMA mapping leak on shutdown
        serial: qcom-geni: fix console shutdown hang
        serdev: Set fwnode for serdev devices
        tty: serial: fsl_lpuart: fix race on RX DMA shutdown
        serial: 8250_pci1xxxx: Disable SERIAL_8250_PCI1XXXX config by default
        serial: 8250_fsl: fix handle_irq locking
        serial: 8250_em: Fix UART port type
        serial: 8250: ASPEED_VUART: select REGMAP instead of depending on it
        tty: serial: fsl_lpuart: skip waiting for transmission complete when UARTCTRL_SBK is asserted
        Revert "tty: serial: fsl_lpuart: adjust SERIAL_FSL_LPUART_CONSOLE config dependency"
      5cdfdd6d
    • Linus Torvalds's avatar
      Merge tag 'char-misc-6.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc · ce86beb4
      Linus Torvalds authored
      Pull char/misc driver fixes from Greg KH:
       "Here are a few small char/misc/other driver subsystem patches to
        resolve reported problems for 6.3-rc3.
      
        Included in here are:
      
         - Interconnect driver fixes for reported problems
      
         - Memory driver fixes for reported problems
      
         - nvmem core fix
      
         - firmware driver fix for reported problem
      
        All of these have been in linux-next for a while with no reported
        issues"
      
      * tag 'char-misc-6.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (23 commits)
        memory: tegra30-emc: fix interconnect registration race
        memory: tegra20-emc: fix interconnect registration race
        memory: tegra124-emc: fix interconnect registration race
        memory: tegra: fix interconnect registration race
        interconnect: exynos: drop redundant link destroy
        interconnect: exynos: fix registration race
        interconnect: exynos: fix node leak in probe PM QoS error path
        interconnect: qcom: msm8974: fix registration race
        interconnect: qcom: rpmh: fix registration race
        interconnect: qcom: rpmh: fix probe child-node error handling
        interconnect: qcom: rpm: fix registration race
        nvmem: core: return -ENOENT if nvmem cell is not found
        firmware: xilinx: don't make a sleepable memory allocation from an atomic context
        interconnect: qcom: rpm: fix probe child-node error handling
        interconnect: qcom: osm-l3: fix registration race
        interconnect: imx: fix registration race
        interconnect: fix provider registration API
        interconnect: fix icc_provider_del() error handling
        interconnect: fix mem leak when freeing nodes
        interconnect: qcom: qcm2290: Fix MASTER_SNOC_BIMC_NRT
        ...
      ce86beb4
    • Linus Torvalds's avatar
      Merge tag 'ras_urgent_for_v6.3_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · c46a7d04
      Linus Torvalds authored
      Pull RAS fix from Borislav Petkov:
      
       - Flush out logged errors immediately after MCA banks configuration
         changes over sysfs have been done instead of waiting until something
         else triggers the workqueue later - another error or the polling
         interval cycle is reached
      
      * tag 'ras_urgent_for_v6.3_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/mce: Make sure logged MCEs are processed after sysfs update
      c46a7d04