kernel/linux.git/arch/parisc, branch v7.1-rc5

ring-buffer: Flush and stop persistent ring buffer on panic

2026-05-21T12:20:58+00:00

On real hardware, panic and machine reboot may not flush hardware cache to memory. This means the persistent ring buffer, which relies on a coherent state of memory, may not have its events written to the buffer and they may be lost. Moreover, there may be inconsistency with the counters which are used for validation of the integrity of the persistent ring buffer which may cause all data to be discarded. To avoid this issue, stop recording of the ring buffer on panic and flush the cache of the ring buffer's memory. Fixes: e645535a954a ("tracing: Add option to use memmapped memory for trace boot instance") Cc: stable@vger.kernel.org Cc: Will Deacon Cc: Mathieu Desnoyers Cc: Ian Rogers Link: https://patch.msgid.link/177751969602.2136606.12031934362587643488.stgit@mhiramat.tok.corp.google.com Signed-off-by: Masami Hiramatsu (Google) Acked-by: Catalin Marinas Acked-by: Geert Uytterhoeven Signed-off-by: Steven Rostedt

parisc: Fix 64-bit kernel build when CONFIG_COMPAT=n

2026-05-01T17:09:30+00:00

VDSO32_SYMBOL() is used in signal.c, defining the value to zero avoids liker issues when CONFIG_COMPAT=n. Signed-off-by: Helge Deller

parisc: Fix build failure for 32-bit kernel with PA2.0 instruction set

2026-04-30T07:10:07+00:00

The CONFIG_PA11 option can not be used as a reliable check if we build a 32-bit kernel which needs the 32-bit VDSO. Instead depend on CONFIG_64BIT and CONFIG_COMPAT only. Reported-by: Christoph Biedl Tested-by: Christoph Biedl Signed-off-by: Helge Deller

parisc: drivers: switch to dynamic root device

2026-04-28T15:18:52+00:00

Driver core expects devices to be dynamically allocated and will, for example, complain loudly if a device that lacks a release function is ever freed. Use root_device_register() to allocate and register the root device instead of open coding using a static device. While at it, drop the redundant additional reference taken at init. Signed-off-by: Johan Hovold Signed-off-by: Helge Deller

Merge tag 'parisc-for-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

2026-04-18T18:37:36+00:00

Pull parisc architecture updates from Helge Deller: - A fix to make modules on 32-bit parisc architecture work again - Drop ip_fast_csum() inline assembly to avoid unaligned memory accesses - Allow to build kernel without 32-bit VDSO - Reference leak fix in error path in LED driver * tag 'parisc-for-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: led: fix reference leak on failed device registration module.lds.S: Fix modules on 32-bit parisc architecture parisc: Allow to build without VDSO32 parisc: Include 32-bit VDSO only when building for 32-bit or compat mode parisc: Allow to disable COMPAT mode on 64-bit kernel parisc: Fix default stack size when COMPAT=n parisc: Fix signal code to depend on CONFIG_COMPAT instead of CONFIG_64BIT parisc: is_compat_task() shall return false for COMPAT=n parisc: Avoid compat syscalls when COMPAT=n parisc: _llseek syscall is only available for 32-bit userspace parisc: Drop ip_fast_csum() inline assembly implementation parisc: update outdated comments for renamed ccio_alloc_consistent()

Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

2026-04-17T22:58:22+00:00

Pull bpf fixes from Alexei Starovoitov: "Most of the diff stat comes from Xu Kuohai's fix to emit ENDBR/BTI, since all JITs had to be touched to move constant blinding out and pass bpf_verifier_env in. - Fix use-after-free in arena_vm_close on fork (Alexei Starovoitov) - Dissociate struct_ops program with map if map_update fails (Amery Hung) - Fix out-of-range and off-by-one bugs in arm64 JIT (Daniel Borkmann) - Fix precedence bug in convert_bpf_ld_abs alignment check (Daniel Borkmann) - Fix arg tracking for imprecise/multi-offset in BPF_ST/STX insns (Eduard Zingerman) - Copy token from main to subprogs to fix missing kallsyms (Eduard Zingerman) - Prevent double close and leak of btf objects in libbpf (Jiri Olsa) - Fix af_unix null-ptr-deref in sockmap (Michal Luczaj) - Fix NULL deref in map_kptr_match_type for scalar regs (Mykyta Yatsenko) - Avoid unnecessary IPIs. Remove redundant bpf_flush_icache() in arm64 and riscv JITs (Puranjay Mohan) - Fix out of bounds access. Validate node_id in arena_alloc_pages() (Puranjay Mohan) - Reject BPF-to-BPF calls and callbacks in arm32 JIT (Puranjay Mohan) - Refactor all JITs to pass bpf_verifier_env to emit ENDBR/BTI for indirect jump targets on x86-64, arm64 JITs (Xu Kuohai) - Allow UTF-8 literals in bpf_bprintf_prepare() (Yihan Ding)" * tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: (32 commits) bpf, arm32: Reject BPF-to-BPF calls and callbacks in the JIT bpf: Dissociate struct_ops program with map if map_update fails bpf: Validate node_id in arena_alloc_pages() libbpf: Prevent double close and leak of btf objects selftests/bpf: cover UTF-8 trace_printk output bpf: allow UTF-8 literals in bpf_bprintf_prepare() selftests/bpf: Reject scalar store into kptr slot bpf: Fix NULL deref in map_kptr_match_type for scalar regs bpf: Fix precedence bug in convert_bpf_ld_abs alignment check bpf, arm64: Emit BTI for indirect jump target bpf, x86: Emit ENDBR for indirect jump targets bpf: Add helper to detect indirect jump targets bpf: Pass bpf_verifier_env to JIT bpf: Move constants blinding out of arch-specific JITs bpf, sockmap: Take state lock for af_unix iter bpf, sockmap: Fix af_unix null-ptr-deref in proto update selftests/bpf: Extend bpf_iter_unix to attempt deadlocking bpf, sockmap: Fix af_unix iter deadlock bpf, sockmap: Annotate af_unix sock:: Sk_state data-races selftests/bpf: verify kallsyms entries for token-loaded subprograms ...

module.lds.S: Fix modules on 32-bit parisc architecture

2026-04-17T13:46:46+00:00

On the 32-bit parisc architecture, we always used the -ffunction-sections compiler option to tell the compiler to put the functions into seperate text sections. This is necessary, otherwise "big" kernel modules like ext4 or ipv6 fail to load because some branches won't be able to reach their stubs. Commit 1ba9f8979426 ("vmlinux.lds: Unify TEXT_MAIN, DATA_MAIN, and related macros") broke this for parisc because all text sections will get unconditionally merged now. Introduce the ARCH_WANTS_MODULES_TEXT_SECTIONS config option which avoids the text section merge for modules, and fix this issue by enabling this option by default for 32-bit parisc. Fixes: 1ba9f8979426 ("vmlinux.lds: Unify TEXT_MAIN, DATA_MAIN, and related macros") Cc: Josh Poimboeuf Cc: stable@vger.kernel.org # v6.19+ Suggested-by: Sami Tolvanen Reviewed-by: Petr Pavlu Signed-off-by: Helge Deller

parisc: Allow to build without VDSO32

2026-04-17T13:46:45+00:00

When building for 64-bit and without CONFIG_COMPAT, leave out the vdso32 binary. Signed-off-by: Helge Deller

parisc: Include 32-bit VDSO only when building for 32-bit or compat mode

2026-04-17T13:46:45+00:00

Signed-off-by: Helge Deller

parisc: Allow to disable COMPAT mode on 64-bit kernel

2026-04-17T13:46:45+00:00

Although we don't yet have a 64-bit userspace, allowing to disable the compat mode should be possible. Signed-off-by: Helge Deller