linux-stable.git/arch/parisc/kernel, branch linux-5.15.y

parisc: _llseek syscall is only available for 32-bit userspace

2026-06-01T15:35:15+00:00

commit da3680f564bd787ce974f9931e6e924d908b3b2a upstream.

Cc: stable@vger.kernel.org
Signed-off-by: Helge Deller 
Signed-off-by: Greg Kroah-Hartman

parisc: Fix initial page table creation for boot

2026-04-18T08:33:15+00:00

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

2026-03-04T12:20:34+00:00

[ 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

2026-03-04T12:20:01+00:00

[ Upstream commit 35ac5a728c878594f2ea6c43b57652a16be3c968 ]

Signed-off-by: Helge Deller 
Signed-off-by: Sasha Levin

parisc: entry: set W bit for !compat tasks in syscall_restore_rfi()

2026-01-19T12:10:01+00:00

commit 5fb1d3ce3e74a4530042795e1e065422295f1371 upstream.

When the kernel leaves to userspace via syscall_restore_rfi(), the
W bit is not set in the new PSW. This doesn't cause any problems
because there's no 64 bit userspace for parisc. Simple static binaries
are usually loaded at addresses way below the 32 bit limit so the W bit
doesn't matter.

Fix this by setting the W bit when TIF_32BIT is not set.

Signed-off-by: Sven Schnelle 
Cc: stable@vger.kernel.org
Signed-off-by: Helge Deller 
Signed-off-by: Greg Kroah-Hartman

parisc: entry.S: fix space adjustment on interruption for 64-bit userspace

2026-01-19T12:10:01+00:00

commit 1aa4524c0c1b54842c4c0a370171d11b12d0709b upstream.

In wide mode, the IASQ contain the upper part of the GVA
during interruption. This needs to be reversed before
the space is used - otherwise it contains parts of IAOQ.
See Page 2-13 "Processing Resources / Interruption Instruction
Address Queues" in the Parisc 2.0 Architecture Manual page 2-13
for an explanation.

The IAOQ/IASQ space_adjust was skipped for other interruptions
than itlb misses. However, the code in handle_interruption()
checks whether iasq[0] contains a valid space. Due to the not
masked out bits this match failed and the process was killed.

Also add space_adjust for IAOQ1/IASQ1 so ptregs contains sane values.

Signed-off-by: Sven Schnelle 
Cc: stable@vger.kernel.org # v6.0+
Signed-off-by: Helge Deller 
Signed-off-by: Greg Kroah-Hartman

sched: Add wrapper for get_wchan() to keep task blocked

2025-08-28T14:24:03+00:00

commit 42a20f86dc19f9282d974df0ba4d226c865ab9dd upstream.

Having a stable wchan means the process must be blocked and for it to
stay that way while performing stack unwinding.

Suggested-by: Peter Zijlstra 
Signed-off-by: Kees Cook 
Signed-off-by: Peter Zijlstra (Intel) 
Acked-by: Geert Uytterhoeven 
Acked-by: Russell King (Oracle)  [arm]
Tested-by: Mark Rutland  [arm64]
Link: https://lkml.kernel.org/r/20211008111626.332092234@infradead.org
Signed-off-by: Siddhi Katage 
Signed-off-by: Greg Kroah-Hartman

parisc: PDT: Fix missing prototype warning

2025-05-02T05:44:34+00:00

[ Upstream commit b899981750dcb958ceffa4462d903963ee494aa2 ]

As reported by the kernel test robot, the following error occurs:

arch/parisc/kernel/pdt.c:65:6: warning: no previous prototype for 'arch_report_meminfo' [-Wmissing-prototypes]
      65 | void arch_report_meminfo(struct seq_file *m)
         |      ^~~~~~~~~~~~~~~~~~~

arch_report_meminfo() is declared in include/linux/proc_fs.h and only
defined when CONFIG_PROC_FS is enabled. Wrap its definition in #ifdef
CONFIG_PROC_FS to fix the -Wmissing-prototypes warning.

Reported-by: kernel test robot 
Closes: https://lore.kernel.org/oe-kbuild-all/202502082315.IPaHaTyM-lkp@intel.com/
Signed-off-by: Yu-Chun Lin 
Signed-off-by: Helge Deller 
Signed-off-by: Sasha Levin

parisc: Fix itlb miss handler for 64-bit programs

2024-10-17T13:11:35+00:00

commit 9542130937e9dc707dd7c6b7af73326437da2d50 upstream.

For an itlb miss when executing code above 4 Gb on ILP64 adjust the
iasq/iaoq in the same way isr/ior was adjusted.  This fixes signal
delivery for the 64-bit static test program from
http://ftp.parisc-linux.org/src/64bit.tar.gz.  Note that signals are
handled by the signal trampoline code in the 64-bit VDSO which is mapped
into high userspace memory region above 4GB for 64-bit processes.

Signed-off-by: Helge Deller 
Cc: stable@vger.kernel.org	# v4.19+
Signed-off-by: Greg Kroah-Hartman

parisc: Fix 64-bit userspace syscall path

2024-10-17T13:10:30+00:00

commit d24449864da5838936669618356b0e30ca2999c3 upstream.

Currently the glibc isn't yet ported to 64-bit for hppa, so
there is no usable userspace available yet.
But it's possible to manually build a static 64-bit binary
and run that for testing. One such 64-bit test program is
available at http://ftp.parisc-linux.org/src/64bit.tar.gz
and it shows various issues with the existing 64-bit syscall
path in the kernel.
This patch fixes those issues.

Signed-off-by: Helge Deller 
Cc: stable@vger.kernel.org      # v4.19+
Signed-off-by: Greg Kroah-Hartman