kernel/arch/parisc, branch linux-rolling-stable

parisc: Check kernel mapping earlier at bootup

2026-03-19T15:15:20Z

commit 17c144f1104bfc29a3ce3f7d0931a1bfb7a3558c upstream. The check if the initial mapping is sufficient needs to happen much earlier during bootup. Move this test directly to the start_parisc() function and use native PDC iodc functions to print the warning, because panic() and printk() are not functional yet. This fixes boot when enabling various KALLSYSMS options which need much more space. Signed-off-by: Helge Deller Cc: # v6.0+ Signed-off-by: Greg Kroah-Hartman

parisc: Fix initial page table creation for boot

2026-03-19T15:15:20Z

commit 8475d8fe21ec9c7eb2faca555fbc5b68cf0d2597 upstream. The KERNEL_INITIAL_ORDER value defines the initial size (usually 32 or 64 MB) of the page table during bootup. Up until now the whole area was initialized with PTE entries, but there was no check if we filled too many entries. Change the code to fill up with so many entries that the "_end" symbol can be reached by the kernel, but not more entries than actually fit into the initial PTE tables. Signed-off-by: Helge Deller Cc: # v6.0+ Signed-off-by: Greg Kroah-Hartman

parisc: Increase initial mapping to 64 MB with KALLSYMS

2026-03-19T15:15:19Z

commit 8e732934fb81282be41602550e7e07baf265e972 upstream. The 32MB initial kernel mapping can become too small when CONFIG_KALLSYMS is used. Increase the mapping to 64 MB in this case. Signed-off-by: Helge Deller Cc: # v6.0+ Signed-off-by: Greg Kroah-Hartman

kbuild: Split .modinfo out from ELF_DETAILS

2026-03-12T11:09:39Z

commit 8678591b47469fe16357234efef9b260317b8be4 upstream. Commit 3e86e4d74c04 ("kbuild: keep .modinfo section in vmlinux.unstripped") added .modinfo to ELF_DETAILS while removing it from COMMON_DISCARDS, as it was needed in vmlinux.unstripped and ELF_DETAILS was present in all architecture specific vmlinux linker scripts. While this shuffle is fine for vmlinux, ELF_DETAILS and COMMON_DISCARDS may be used by other linker scripts, such as the s390 and x86 compressed boot images, which may not expect to have a .modinfo section. In certain circumstances, this could result in a bootloader failing to load the compressed kernel [1]. Commit ddc6cbef3ef1 ("s390/boot/vmlinux.lds.S: Ensure bzImage ends with SecureBoot trailer") recently addressed this for the s390 bzImage but the same bug remains for arm, parisc, and x86. The presence of .modinfo in the x86 bzImage was the root cause of the issue worked around with commit d50f21091358 ("kbuild: align modinfo section for Secureboot Authenticode EDK2 compat"). misc.c in arch/x86/boot/compressed includes lib/decompress_unzstd.c, which in turn includes lib/xxhash.c and its MODULE_LICENSE / MODULE_DESCRIPTION macros due to the STATIC definition. Split .modinfo out from ELF_DETAILS into its own macro and handle it in all vmlinux linker scripts. Discard .modinfo in the places where it was previously being discarded from being in COMMON_DISCARDS, as it has never been necessary in those uses. Cc: stable@vger.kernel.org Fixes: 3e86e4d74c04 ("kbuild: keep .modinfo section in vmlinux.unstripped") Reported-by: Ed W Closes: https://lore.kernel.org/587f25e0-a80e-46a5-9f01-87cb40cfa377@wildgooses.com/ [1] Tested-by: Ed W # x86_64 Link: https://patch.msgid.link/20260225-separate-modinfo-from-elf-details-v1-1-387ced6baf4b@kernel.org Signed-off-by: Nathan Chancellor Signed-off-by: Greg Kroah-Hartman

parisc: kernel: replace kfree() with put_device() in create_tree_node()

2026-03-04T12:21:35Z

[ Upstream commit dcf69599c47f29ce0a99117eb3f9ddcd2c4e78b6 ] If device_register() fails, put_device() is the correct way to drop the device reference. Found by code review. Fixes: 1070c9655b90 ("[PA-RISC] Fix must_check warnings in drivers.c") Cc: stable@vger.kernel.org Signed-off-by: Haoxiang Li Signed-off-by: Helge Deller Signed-off-by: Sasha Levin

parisc: Prevent interrupts during reboot

2026-03-04T12:19:48Z

[ Upstream commit 35ac5a728c878594f2ea6c43b57652a16be3c968 ] Signed-off-by: Helge Deller Signed-off-by: Sasha Levin

Merge tag 'tty-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2025-12-07T02:38:19Z

Pull tty/serial updates from Greg KH: "Here is the big set of tty/serial driver changes for 6.19-rc1. Nothing major at all, just small constant churn to make the tty layer "cleaner" as well as serial driver updates and even a new test added! Included in here are: - More tty/serial cleanups from Jiri - tty tiocsti test added to hopefully ensure we don't regress in this area again - sc16is7xx driver updates - imx serial driver updates - 8250 driver updates - new hardware device ids added - other minor serial/tty driver cleanups and tweaks All of these have been in linux-next for a while with no reported issues" * tag 'tty-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (60 commits) serial: sh-sci: Fix deadlock during RSCI FIFO overrun error dt-bindings: serial: rsci: Drop "uart-has-rtscts: false" LoongArch: dts: Add uart new compatible string serial: 8250: Add Loongson uart driver support dt-bindings: serial: 8250: Add Loongson uart compatible serial: 8250: add driver for KEBA UART serial: Keep rs485 settings for devices without firmware node serial: qcom-geni: Enable Serial on SA8255p Qualcomm platforms serial: qcom-geni: Enable PM runtime for serial driver serial: sprd: Return -EPROBE_DEFER when uart clock is not ready tty: serial: samsung: Declare earlycon for Exynos850 serial: icom: Convert PCIBIOS_* return codes to errnos serial: 8250-of: Fix style issues in 8250_of.c serial: add support of CPCI cards serial: mux: Fix kernel doc for mux_poll() tty: replace use of system_unbound_wq with system_dfl_wq serial: 8250_platform: simplify IRQF_SHARED handling serial: 8250: make share_irqs local to 8250_platform serial: 8250: move skip_txen_test to core serial: drop SERIAL_8250_DEPRECATED_OPTIONS ...

Merge tag 'parisc-for-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

2025-12-07T00:24:52Z

Pull parisc architecture updates from Helge Deller: "A fix which allows booting on the very old 710 workstations, and two fixes in the syscall entry/exit path which allow to execute 64-bit userspace binaries. Note that although we currently have a 64-bit (static) kernel to allow more than 4 GB physical RAM, there is no support for 64-bit userspace for parisc-linux yet, but Dave and Sven are making slowly progress to port and fix glibc and gcc. Summary: - Fix boot on 710 workstation by not reprogramming ASP chip - Fix 64bit userspace syscalls (64-bit userspace is still being developed) - minor code cleanups in asm/bug.h and perf_regs.c" * tag 'parisc-for-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Do not reprogram affinitiy on ASP chip parisc: Drop linux/kernel.h include from asm/bug.h header parisc: remove unneeded semicolon in perf_regs.c parisc: entry.S: fix space adjustment on interruption for 64-bit userspace parisc: entry: set W bit for !compat tasks in syscall_restore_rfi() parisc: Drop padding fields and layers entries from inventory log

Merge tag 'core-bugs-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-12-02T05:33:01Z

Pull bug handling infrastructure updates from Ingo Molnar: "Core updates: - Improve WARN(), which has vararg printf like arguments, to work with the x86 #UD based WARN-optimizing infrastructure by hiding the format in the bug_table and replacing this first argument with the address of the bug-table entry, while making the actual function that's called a UD1 instruction (Peter Zijlstra) - Introduce the CONFIG_DEBUG_BUGVERBOSE_DETAILED Kconfig switch (Ingo Molnar, s390 support by Heiko Carstens) Fixes and cleanups: - bugs/s390: Remove private WARN_ON() implementation (Heiko Carstens) - : Make i386 use GENERIC_BUG_RELATIVE_POINTERS (Peter Zijlstra)" * tag 'core-bugs-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits) x86/bugs: Make i386 use GENERIC_BUG_RELATIVE_POINTERS x86/bug: Fix BUG_FORMAT vs KASLR x86_64/bug: Inline the UD1 x86/bug: Implement WARN_ONCE() x86_64/bug: Implement __WARN_printf() x86/bug: Use BUG_FORMAT for DEBUG_BUGVERBOSE_DETAILED x86/bug: Add BUG_FORMAT basics bug: Allow architectures to provide __WARN_printf() bug: Implement WARN_ON() using __WARN_FLAGS() bug: Add report_bug_entry() bug: Add BUG_FORMAT_ARGS infrastructure bug: Clean up CONFIG_GENERIC_BUG_RELATIVE_POINTERS bug: Add BUG_FORMAT infrastructure x86: Rework __bug_table helpers bugs/s390: Remove private WARN_ON() implementation bugs/core: Reorganize fields in the first line of WARNING output, add ->comm[] output bugs/sh: Concatenate 'cond_str' with '__FILE__' in __WARN_FLAGS(), to extend WARN_ON/BUG_ON output bugs/parisc: Concatenate 'cond_str' with '__FILE__' in __WARN_FLAGS(), to extend WARN_ON/BUG_ON output bugs/riscv: Concatenate 'cond_str' with '__FILE__' in __BUG_FLAGS(), to extend WARN_ON/BUG_ON output bugs/riscv: Pass in 'cond_str' to __BUG_FLAGS() ...

Merge tag 'namespace-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

2025-12-01T17:47:41Z

Pull namespace updates from Christian Brauner: "This contains substantial namespace infrastructure changes including a new system call, active reference counting, and extensive header cleanups. The branch depends on the shared kbuild branch for -fms-extensions support. Features: - listns() system call Add a new listns() system call that allows userspace to iterate through namespaces in the system. This provides a programmatic interface to discover and inspect namespaces, addressing longstanding limitations: Currently, there is no direct way for userspace to enumerate namespaces. Applications must resort to scanning /proc/*/ns/ across all processes, which is: - Inefficient - requires iterating over all processes - Incomplete - misses namespaces not attached to any running process but kept alive by file descriptors, bind mounts, or parent references - Permission-heavy - requires access to /proc for many processes - No ordering or ownership information - No filtering per namespace type The listns() system call solves these problems: ssize_t listns(const struct ns_id_req *req, u64 *ns_ids, size_t nr_ns_ids, unsigned int flags); struct ns_id_req { __u32 size; __u32 spare; __u64 ns_id; struct /* listns */ { __u32 ns_type; __u32 spare2; __u64 user_ns_id; }; }; Features include: - Pagination support for large namespace sets - Filtering by namespace type (MNT_NS, NET_NS, USER_NS, etc.) - Filtering by owning user namespace - Permission checks respecting namespace isolation - Active Reference Counting Introduce an active reference count that tracks namespace visibility to userspace. A namespace is visible in the following cases: - The namespace is in use by a task - The namespace is persisted through a VFS object (namespace file descriptor or bind-mount) - The namespace is a hierarchical type and is the parent of child namespaces The active reference count does not regulate lifetime (that's still done by the normal reference count) - it only regulates visibility to namespace file handles and listns(). This prevents resurrection of namespaces that are pinned only for internal kernel reasons (e.g., user namespaces held by file->f_cred, lazy TLB references on idle CPUs, etc.) which should not be accessible via (1)-(3). - Unified Namespace Tree Introduce a unified tree structure for all namespaces with: - Fixed IDs assigned to initial namespaces - Lookup based solely on inode number - Maintained list of owned namespaces per user namespace - Simplified rbtree comparison helpers Cleanups - Header Reorganization: - Move namespace types into separate header (ns_common_types.h) - Decouple nstree from ns_common header - Move nstree types into separate header - Switch to new ns_tree_{node,root} structures with helper functions - Use guards for ns_tree_lock - Initial Namespace Reference Count Optimization - Make all reference counts on initial namespaces a nop to avoid pointless cacheline ping-pong for namespaces that can never go away - Drop custom reference count initialization for initial namespaces - Add NS_COMMON_INIT() macro and use it for all namespaces - pid: rely on common reference count behavior - Miscellaneous Cleanups - Rename exit_task_namespaces() to exit_nsproxy_namespaces() - Rename is_initial_namespace() and make argument const - Use boolean to indicate anonymous mount namespace - Simplify owner list iteration in nstree - nsfs: raise SB_I_NODEV, SB_I_NOEXEC, and DCACHE_DONTCACHE explicitly - nsfs: use inode_just_drop() - pidfs: raise DCACHE_DONTCACHE explicitly - pidfs: simplify PIDFD_GET__NAMESPACE ioctls - libfs: allow to specify s_d_flags - cgroup: add cgroup namespace to tree after owner is set - nsproxy: fix free_nsproxy() and simplify create_new_namespaces() Fixes: - setns(pidfd, ...) race condition Fix a subtle race when using pidfds with setns(). When the target task exits after prepare_nsset() but before commit_nsset(), the namespace's active reference count might have been dropped. If setns() then installs the namespaces, it would bump the active reference count from zero without taking the required reference on the owner namespace, leading to underflow when later decremented. The fix resurrects the ownership chain if necessary - if the caller succeeded in grabbing passive references, the setns() should succeed even if the target task exits or gets reaped. - Return EFAULT on put_user() error instead of success - Make sure references are dropped outside of RCU lock (some namespaces like mount namespace sleep when putting the last reference) - Don't skip active reference count initialization for network namespace - Add asserts for active refcount underflow - Add asserts for initial namespace reference counts (both passive and active) - ipc: enable is_ns_init_id() assertions - Fix kernel-doc comments for internal nstree functions - Selftests - 15 active reference count tests - 9 listns() functionality tests - 7 listns() permission tests - 12 inactive namespace resurrection tests - 3 threaded active reference count tests - commit_creds() active reference tests - Pagination and stress tests - EFAULT handling test - nsid tests fixes" * tag 'namespace-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (103 commits) pidfs: simplify PIDFD_GET__NAMESPACE ioctls nstree: fix kernel-doc comments for internal functions nsproxy: fix free_nsproxy() and simplify create_new_namespaces() selftests/namespaces: fix nsid tests ns: drop custom reference count initialization for initial namespaces pid: rely on common reference count behavior ns: add asserts for initial namespace active reference counts ns: add asserts for initial namespace reference counts ns: make all reference counts on initial namespace a nop ipc: enable is_ns_init_id() assertions fs: use boolean to indicate anonymous mount namespace ns: rename is_initial_namespace() ns: make is_initial_namespace() argument const nstree: use guards for ns_tree_lock nstree: simplify owner list iteration nstree: switch to new structures nstree: add helper to operate on struct ns_tree_{node,root} nstree: move nstree types into separate header nstree: decouple from ns_common header ns: move namespace types into separate header ...