linux-stable.git/arch/parisc/kernel/syscalls, branch linux-6.6.y

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

2026-05-17T15:13:28+00:00

commit da3680f564bd787ce974f9931e6e924d908b3b2a upstream.

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

parisc: use generic sys_fanotify_mark implementation

2024-07-05T07:33:54+00:00

[ Upstream commit 403f17a330732a666ae793f3b15bc75bb5540524 ]

The sys_fanotify_mark() syscall on parisc uses the reverse word order
for the two halves of the 64-bit argument compared to all syscalls on
all 32-bit architectures. As far as I can tell, the problem is that
the function arguments on parisc are sorted backwards (26, 25, 24, 23,
...) compared to everyone else, so the calling conventions of using an
even/odd register pair in native word order result in the lower word
coming first in function arguments, matching the expected behavior
on little-endian architectures. The system call conventions however
ended up matching what the other 32-bit architectures do.

A glibc cleanup in 2020 changed the userspace behavior in a way that
handles all architectures consistently, but this inadvertently broke
parisc32 by changing to the same method as everyone else.

The change made it into glibc-2.35 and subsequently into debian 12
(bookworm), which is the latest stable release. This means we
need to choose between reverting the glibc change or changing the
kernel to match it again, but either hange will leave some systems
broken.

Pick the option that is more likely to help current and future
users and change the kernel to match current glibc. This also
means the behavior is now consistent across architectures, but
it breaks running new kernels with old glibc builds before 2.35.

Link: https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=d150181d73d9
Link: https://git.kernel.org/pub/scm/linux/kernel/git/history/history.git/commit/arch/parisc/kernel/sys_parisc.c?h=57b1dfbd5b4a39d
Cc: Adhemerval Zanella 
Tested-by: Helge Deller 
Acked-by: Helge Deller 
Signed-off-by: Arnd Bergmann

parisc: use correct compat recv/recvfrom syscalls

2024-07-05T07:33:48+00:00

[ Upstream commit 20a50787349fadf66ac5c48f62e58d753878d2bb ]

Johannes missed parisc back when he introduced the compat version
of these syscalls, so receiving cmsg messages that require a compat
conversion is still broken.

Use the correct calls like the other architectures do.

Fixes: 1dacc76d0014 ("net/compat/wext: send different messages to compat tasks")
Acked-by: Helge Deller 
Signed-off-by: Arnd Bergmann 
Signed-off-by: Sasha Levin

arch: Register fchmodat2, usually as syscall 452

2023-07-27T10:25:35+00:00

This registers the new fchmodat2 syscall in most places as nuber 452,
with alpha being the exception where it's 562.  I found all these sites
by grepping for fspick, which I assume has found me everything.

Signed-off-by: Palmer Dabbelt 
Signed-off-by: Alexey Gladkov 
Acked-by: Arnd Bergmann 
Acked-by: Geert Uytterhoeven 
Message-Id: 
Signed-off-by: Christian Brauner

parisc: Add cacheflush() syscall

2023-06-30T15:14:13+00:00

Signed-off-by: Helge Deller

cachestat: wire up cachestat for other architectures

2023-06-09T23:25:16+00:00

cachestat is previously only wired in for x86 (and architectures using
the generic unistd.h table):

https://lore.kernel.org/lkml/20230503013608.2431726-1-nphamcs@gmail.com/

This patch wires cachestat in for all the other architectures.

[nphamcs@gmail.com: wire up cachestat for arm64]
  Link: https://lkml.kernel.org/r/20230511092843.3896327-1-nphamcs@gmail.com
Link: https://lkml.kernel.org/r/20230510195806.2902878-1-nphamcs@gmail.com
Signed-off-by: Nhat Pham 
Tested-by: Michael Ellerman 	[powerpc]
Acked-by: Geert Uytterhoeven 	[m68k]
Reviewed-by: Arnd Bergmann 
Acked-by: Heiko Carstens 		[s390]
Cc: Alexander Gordeev 
Cc: Christian Borntraeger 
Cc: Christophe Leroy 
Cc: Chris Zankel 
Cc: David S. Miller 
Cc: Helge Deller 
Cc: Ivan Kokshaysky 
Cc: "James E.J. Bottomley" 
Cc: Johannes Weiner 
Cc: John Paul Adrian Glaubitz 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Michal Simek 
Cc: Nicholas Piggin 
Cc: Richard Henderson 
Cc: Rich Felker 
Cc: Russell King 
Cc: Sven Schnelle 
Cc: Thomas Bogendoerfer 
Cc: Vasily Gorbik 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton

parisc: Align parisc MADV_XXX constants with all other architectures

2022-12-17T22:19:39+00:00

Adjust some MADV_XXX constants to be in sync what their values are on
all other platforms. There is currently no reason to have an own
numbering on parisc, but it requires workarounds in many userspace
sources (e.g. glibc, qemu, ...) - which are often forgotten and thus
introduce bugs and different behaviour on parisc.

A wrapper avoids an ABI breakage for existing userspace applications by
translating any old values to the new ones, so this change allows us to
move over all programs to the new ABI over time.

Signed-off-by: Helge Deller

parisc: io_pgetevents_time64() needs compat syscall in 32-bit compat mode

2022-08-01T16:43:24+00:00

For all syscalls in 32-bit compat mode on 64-bit kernels the upper
32-bits of the 64-bit registers are zeroed out, so a negative 32-bit
signed value will show up as positive 64-bit signed value.

This behaviour breaks the io_pgetevents_time64() syscall which expects
signed 64-bit values for the "min_nr" and "nr" parameters.
Fix this by switching to the compat_sys_io_pgetevents_time64() syscall,
which uses "compat_long_t" types for those parameters.

Cc:  # v5.1+
Signed-off-by: Helge Deller

arch: syscalls: simplify uapi/kapi directory creation

2022-03-31T03:03:46+00:00

$(shell ...) expands to empty. There is no need to assign it to _dummy.

Signed-off-by: Masahiro Yamada 
Acked-by: Geert Uytterhoeven

mm/mempolicy: wire up syscall set_mempolicy_home_node

2022-01-15T14:30:30+00:00

Link: https://lkml.kernel.org/r/20211202123810.267175-4-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V 
Cc: Ben Widawsky 
Cc: Dave Hansen 
Cc: Feng Tang 
Cc: Michal Hocko 
Cc: Andrea Arcangeli 
Cc: Mel Gorman 
Cc: Mike Kravetz 
Cc: Randy Dunlap 
Cc: Vlastimil Babka 
Cc: Andi Kleen 
Cc: Dan Williams 
Cc: Huang Ying 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds