linux-stable.git/arch/nios2/include, branch linux-4.9.y

nios2: add force_successful_syscall_return()

2022-08-25T09:09:30+00:00

commit fd0c153daad135d0ec1a53c5dbe6936a724d6ae1 upstream.

If we use the ancient SysV syscall ABI, we'd better have tell the
kernel how to claim that a negative return value is a success.
Use ->orig_r2 for that - it's inaccessible via ptrace, so it's
a fair game for changes and it's normally[*] non-negative on return
from syscall.  Set to -1; syscall is not going to be restart-worthy
by definition, so we won't interfere with that use either.

[*] the only exception is rt_sigreturn(), where we skip the entire
messing with r1/r2 anyway.

Fixes: 82ed08dd1b0e ("nios2: Exception handling")
Signed-off-by: Al Viro 
Signed-off-by: Dinh Nguyen 
Signed-off-by: Greg Kroah-Hartman

nios2: page fault et.al. are not restartable syscalls...

2022-08-25T09:09:29+00:00

commit 8535c239ac674f7ead0f2652932d35c52c4123b2 upstream.

make sure that ->orig_r2 is negative for everything except
the syscalls.

Fixes: 82ed08dd1b0e ("nios2: Exception handling")
Signed-off-by: Al Viro 
Signed-off-by: Dinh Nguyen 
Signed-off-by: Greg Kroah-Hartman

nios2: use fallback for random_get_entropy() instead of zero

2022-06-25T09:45:13+00:00

commit c04e72700f2293013dab40208e809369378f224c upstream.

In the event that random_get_entropy() can't access a cycle counter or
similar, falling back to returning 0 is really not the best we can do.
Instead, at least calling random_get_entropy_fallback() would be
preferable, because that always needs to return _something_, even
falling back to jiffies eventually. It's not as though
random_get_entropy_fallback() is super high precision or guaranteed to
be entropic, but basically anything that's not zero all the time is
better than returning zero all the time.

Cc: Thomas Gleixner 
Cc: Arnd Bergmann 
Acked-by: Dinh Nguyen 
Signed-off-by: Jason A. Donenfeld 
Signed-off-by: Greg Kroah-Hartman

NIOS2: irqflags: rename a redefined register name

2021-10-27T07:33:59+00:00

[ Upstream commit 4cce60f15c04d69eff6ffc539ab09137dbe15070 ]

Both arch/nios2/ and drivers/mmc/host/tmio_mmc.c define a macro
with the name "CTL_STATUS". Change the one in arch/nios2/ to be
"CTL_FSTATUS" (flags status) to eliminate the build warning.

In file included from ../drivers/mmc/host/tmio_mmc.c:22:
drivers/mmc/host/tmio_mmc.h:31: warning: "CTL_STATUS" redefined
   31 | #define CTL_STATUS 0x1c
arch/nios2/include/asm/registers.h:14: note: this is the location of the previous definition
   14 | #define CTL_STATUS      0

Fixes: b31ebd8055ea ("nios2: Nios2 registers")
Signed-off-by: Randy Dunlap 
Cc: Dinh Nguyen 
Signed-off-by: Dinh Nguyen 
Signed-off-by: Sasha Levin

nios2: use of_property_read_bool

2016-10-06T10:19:16+00:00

Use of_property_read_bool instead of open-coding it as fpcu_has.
Convert the members of struct cpuinfo from u32 to bool accordingly as
they are only used as boolean anyhow.

Signed-off-by: Tobias Klauser 

Acked-by: Ley Foon Tan

nios2: fix __get_user()

2016-09-13T21:49:43+00:00

a) should not leave crap on fault
b) should _not_ require access_ok() in any cases.

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro

nios2: copy_from_user() should zero the tail of destination

2016-09-13T21:49:43+00:00

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro

nios2: get rid of superfluous __GFP_REPEAT

2016-06-25T00:23:52+00:00

__GFP_REPEAT has a rather weak semantic but since it has been introduced
around 2.6.12 it has been ignored for low order allocations.

pte_alloc_one{_kernel} allocate PTE_ORDER which is 0.  This means that
this flag has never been actually useful here because it has always been
used only for PAGE_ALLOC_COSTLY requests.

Link: http://lkml.kernel.org/r/1464599699-30131-9-git-send-email-mhocko@kernel.org
Signed-off-by: Michal Hocko 
Cc: Ley Foon Tan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'asm-generic-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

2016-05-24T22:24:37+00:00

Pull asm-generic cleanup from Arnd Bergmann:
 "I have only one patch for asm-generic in this release, this one is
  from James Hogan and updates the generic system call table for
  renameat2 so we don't need to provide both renameat and renameat2 in
  newly added architectures"

* tag 'asm-generic-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  asm-generic: Drop renameat syscall from default list

exit_thread: remove empty bodies

2016-05-21T00:58:30+00:00

Define HAVE_EXIT_THREAD for archs which want to do something in
exit_thread. For others, let's define exit_thread as an empty inline.

This is a cleanup before we change the prototype of exit_thread to
accept a task parameter.

[akpm@linux-foundation.org: fix mips]
Signed-off-by: Jiri Slaby 
Cc: "David S. Miller" 
Cc: "H. Peter Anvin" 
Cc: "James E.J. Bottomley" 
Cc: Aurelien Jacquiot 
Cc: Benjamin Herrenschmidt 
Cc: Catalin Marinas 
Cc: Chen Liqin 
Cc: Chris Metcalf 
Cc: Chris Zankel 
Cc: David Howells 
Cc: Fenghua Yu 
Cc: Geert Uytterhoeven 
Cc: Guan Xuetao 
Cc: Haavard Skinnemoen 
Cc: Hans-Christian Egtvedt 
Cc: Heiko Carstens 
Cc: Helge Deller 
Cc: Ingo Molnar 
Cc: Ivan Kokshaysky 
Cc: James Hogan 
Cc: Jeff Dike 
Cc: Jesper Nilsson 
Cc: Jiri Slaby 
Cc: Jonas Bonn 
Cc: Koichi Yasutake 
Cc: Lennox Wu 
Cc: Ley Foon Tan 
Cc: Mark Salter 
Cc: Martin Schwidefsky 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Michael Ellerman 
Cc: Michal Simek 
Cc: Mikael Starvik 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Ralf Baechle 
Cc: Rich Felker 
Cc: Richard Henderson 
Cc: Richard Kuo 
Cc: Richard Weinberger 
Cc: Russell King 
Cc: Steven Miao 
Cc: Thomas Gleixner 
Cc: Tony Luck 
Cc: Vineet Gupta 
Cc: Will Deacon 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds