kernel/linux.git/drivers/s390/char, branch v6.18.21

Merge tag 's390-6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2025-10-09T17:51:43+00:00

Pull more s390 updates from Alexander Gordeev: - Compile the decompressor with -Wno-pointer-sign flag to avoid a clang warning - Fix incomplete conversion to flag output macros in __xsch(), to avoid always zero return value instead of the expected condition code - Remove superfluous newlines from inline assemblies to improve compiler inlining decisions - Expose firmware provided UID Checking state in sysfs regardless of the device presence or state - CIO does not unregister subchannels when the attached device is invalid or unavailable. Update the purge function to remove I/O subchannels if the device number is found on cio_ignore list - Consolidate PAI crypto allocation and cleanup paths - The uv_get_secret_metadata() function has been removed some few months ago, remove also the function mention it in a comment * tag 's390-6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/uv: Fix comment of uv_find_secret() function s390/pai_crypto: Consolidate PAI crypto allocation and cleanup paths s390/cio: Update purge function to unregister the unused subchannels s390/pci: Expose firmware provided UID Checking state in sysfs s390: Remove superfluous newlines from inline assemblies s390/cio/ioasm: Fix __xsch() condition code handling s390: Add -Wno-pointer-sign to KBUILD_CFLAGS_DECOMPRESSOR

Merge tag 'tty-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2025-10-04T22:57:44+00:00

Pull tty/serial updates from Greg KH: "Here are some small updates for tty/serial drivers for 6.18-rc1. Not many changes overall, just the usual: - abi cleanups and reworking of the tty functions by Jiri by adding console lock guard logic - 8250_platform driver updates - qcom-geni driver updates - other minor serial driver updates - some more vt escape codes added All of these have been in linux-next for a while with no reported issues" * tag 'tty-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (43 commits) tty: serial: fix help message for SERIAL_CPM serial: 8250: omap: Support wakeup pinctrl state on suspend dt-bindings: serial: 8250_omap: Add wakeup pinctrl state serial: max310x: improve interrupt handling vt: move vc_saved_screen to within tty allocated judgment Revert "m68k: make HPDCA and HPAPCI bools" tty: remove redundant condition checks tty/vt: Add missing return value for VT_RESIZE in vt_ioctl() vt: remove redundant check on vc_mode in con_font_set() serial: qcom-geni: Add DFS clock mode support to GENI UART driver m68k: make HPDCA and HPAPCI bools tty: n_gsm: Don't block input queue by waiting MSC serial: qcom-geni: Fix off-by-one error in ida_alloc_range() serdev: Drop dev_pm_domain_detach() call serial: sc16is7xx: drop redundant conversion to bool vt: add support for smput/rmput escape codes serial: stm32: allow selecting console when the driver is module serial: 8250_core: fix coding style issue tty: serial: Modify the use of dev_err_probe() s390/char/con3270: use tty_port_tty guard() ...

Merge tag 's390-6.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2025-09-30T02:14:25+00:00

Pull s390 updates from Alexander Gordeev: - Refactor SCLP memory hotplug code - Introduce common boot_panic() decompressor helper macro and use it to get rid of nearly few identical implementations - Take into account additional key generation flags and forward it to the ep11 implementation. With that allow users to modify the key generation process, e.g. provide valid combinations of XCP_BLOB_* flags - Replace kmalloc() + copy_from_user() with memdup_user_nul() in s390 debug facility and HMC driver - Add DAX support for DCSS memory block devices - Make the compiler statement attribute "assume" available with a new __assume macro - Rework ffs() and fls() family bitops functions, including source code improvements and generated code optimizations. Use the newly introduced __assume macro for that - Enable additional network features in default configurations - Use __GFP_ACCOUNT flag for user page table allocations to add missing kmemcg accounting - Add WQ_PERCPU flag to explicitly request the use of the per-CPU workqueue for 3590 tape driver - Switch power reading to the per-CPU and the Hiperdispatch to the default workqueue - Add memory allocation profiling hooks to allow better profiling data and the /proc/allocinfo output similar to other architectures * tag 's390-6.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (21 commits) s390/mm: Add memory allocation profiling hooks s390: Replace use of system_wq with system_dfl_wq s390/diag324: Replace use of system_wq with system_percpu_wq s390/tape: Add WQ_PERCPU to alloc_workqueue users s390/bitops: Switch to generic ffs() if supported by compiler s390/bitops: Switch to generic fls(), fls64(), etc. s390/mm: Use __GFP_ACCOUNT for user page table allocations s390/configs: Enable additional network features s390/bitops: Cleanup __flogr() s390/bitops: Use __assume() for __flogr() inline assembly return value compiler_types: Add __assume macro s390/bitops: Limit return value range of __flogr() s390/dcssblk: Add DAX support s390/hmcdrv: Replace kmalloc() + copy_from_user() with memdup_user_nul() s390/debug: Replace kmalloc() + copy_from_user() with memdup_user_nul() s390/pkey: Forward keygenflags to ep11_unwrapkey s390/boot: Add common boot_panic() code s390/bitops: Optimize inlining s390/bitops: Slightly optimize ffs() and fls64() s390/sclp: Move memory hotplug code for better modularity ...

s390: Remove superfluous newlines from inline assemblies

2025-09-29T11:52:08+00:00

Remove superfluous newlines from inline assemblies. Compilers use the number of lines of inline assemblies as heuristic for the complexity and inline decisions. Therefore inline assemblies should only contain as many lines as required. A lot of inline assemblies contain a superfluous newline for the last line. Remove such newlines to improve compiler inlining decisions. Suggested-by: Juergen Christ Signed-off-by: Heiko Carstens Reviewed-by: Alexander Gordeev Reviewed-by: Juergen Christ Signed-off-by: Alexander Gordeev

s390/tape: Add WQ_PERCPU to alloc_workqueue users

2025-09-25T12:28:58+00:00

Currently if a user enqueue a work item using schedule_delayed_work() the used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to schedule_work() that is using system_wq and queue_work(), that makes use again of WORK_CPU_UNBOUND. This lack of consistentcy cannot be addressed without refactoring the API. alloc_workqueue() treats all queues as per-CPU by default, while unbound workqueues must opt-in via WQ_UNBOUND. This default is suboptimal: most workloads benefit from unbound queues, allowing the scheduler to place worker threads where they’re needed and reducing noise when CPUs are isolated. This patch adds a new WQ_PERCPU flag to explicitly request the use of the per-CPU behavior. Both flags coexist for one release cycle to allow callers to transition their calls. Once migration is complete, WQ_UNBOUND can be removed and unbound will become the implicit default. With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND), any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND must now use WQ_PERCPU. All existing users have been updated accordingly. Suggested-by: Tejun Heo Signed-off-by: Marco Crivellari Acked-by: Alexander Gordeev Acked-by: Heiko Carstens Signed-off-by: Alexander Gordeev

Merge 6.17-rc6 into tty-next

2025-09-15T06:27:31+00:00

We need the tty/serial fixes in here as well. Signed-off-by: Greg Kroah-Hartman

s390/hmcdrv: Replace kmalloc() + copy_from_user() with memdup_user_nul()

2025-09-09T13:03:13+00:00

Replace kmalloc() followed by copy_from_user() with memdup_user_nul() to improve and simplify hmcdrv_dev_write(). Remove the manual NUL-termination. No functional changes intended. Signed-off-by: Thorsten Blum Signed-off-by: Alexander Gordeev

s390/sclp: Move memory hotplug code for better modularity

2025-08-20T14:38:23+00:00

To improve readability and prepare for future extensions, move the memory hotplug code to a separate file. In addtion to it, add required headers in sclp_mem.c and remove unnecessary headers in sclp_cmd.c Acked-by: Heiko Carstens Signed-off-by: Sumanth Korikkar Signed-off-by: Alexander Gordeev

s390/sclp: Refactor sclp_cmd.c

2025-08-20T14:38:23+00:00

To improve readability, refactor sclp_cmd.c: * Move defines and structures to the beginning. * Reverse x-mas tree usage. * Remove spaces after casting to eliminate checkpatch warnings. * Remove unnecessary comments. * Reframe certain comments. * Convert all unsigned long long to unsigned long since unsigned long long is a leftover from the 31/32-bit era. * Use correct format specifiers. * Add braces to for loops with bodies containing more than one line. * Sort header files and remove unnecessary ones. * Use __packed and __aligned instead of __attribute((packed, aligned(8))) in structures. Acked-by: Heiko Carstens Signed-off-by: Sumanth Korikkar Signed-off-by: Alexander Gordeev

s390/sclp: Fix SCCB present check

2025-08-20T14:37:27+00:00

Tracing code called by the SCLP interrupt handler contains early exits if the SCCB address associated with an interrupt is NULL. This check is performed after physical to virtual address translation. If the kernel identity mapping does not start at address zero, the resulting virtual address is never zero, so that the NULL checks won't work. Subsequently this may result in incorrect accesses to the first page of the identity mapping. Fix this by introducing a function that handles the NULL case before address translation. Fixes: ada1da31ce34 ("s390/sclp: sort out physical vs virtual pointers usage") Cc: stable@vger.kernel.org Reviewed-by: Alexander Gordeev Signed-off-by: Peter Oberparleiter Signed-off-by: Alexander Gordeev