arm: switch to struct ksignal * passing

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

alpha: pass k_sigaction and siginfo_t using ksignal pointer

... and use the new helpers

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

burying unused conditionals

__ARCH_WANT_SYS_RT_SIGACTION,
__ARCH_WANT_SYS_RT_SIGSUSPEND,
__ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND,
__ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL - not used anymore
CONFIG_GENERIC_{SIGALTSTACK,COMPAT_RT_SIG{ACTION,QUEUEINFO,PENDING,PROCMASK}} -
can be assumed always set.

make do_sigaltstack() static

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Merge branches 'arch-alpha', 'arch-arm', 'arch-arm64', 'arch-avr32', 'arch-blackfin', 'arch-c6x', 'arch-cris', 'arch-frv', 'arch-h8300', 'arch-hexagon', 'arch-ia64', 'arch-m32r', 'arch-m68k', 'arch-microblaze', 'arch-mips', 'arch-mn10300', 'arch-openrisc', 'arch-parisc', 'arch-powerpc', 'arch-s390', 'arch-score', 'arch-sh', 'arch-sparc', 'arch-tile', 'arch-unicore32', 'arch-x86' and 'arch-xtensa'

arm64: switch to generic old sigaction() (compat-only)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arm64: switch to generic compat rt_sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arm64: switch compat to generic old sigsuspend

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arm64: switch to generic compat rt_sigqueueinfo()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arm64: switch to generic compat rt_sigpending()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arm64: switch to generic compat rt_sigprocmask()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arm64: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sparc: switch to generic old sigsuspend

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sparc: COMPAT_SYSCALL_DEFINE does all sign-extension as well as SYSCALL_DEFINE

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sparc: kill sign-extending wrappers for native syscalls

SYSCALL_DEFINE-added wrapper will take care of those just fine;
no extra compat wrappers needed.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

kill sparc32_open()

it's a copy of compat_sys_open()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sparc: switch to use of generic old sigaction

note that due to historical accident we do *not* directly take
generic versions - need to check and invert the sign of signal
number first.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sparc: switch sys_compat_rt_sigaction() to COMPAT_SYSCALL_DEFINE

note that while struct compat_sigaction is the generic one, syscall
itself *isn't* - different arguments.  IOW, CONFIG_ODD_RT_SIGACTION
stays.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mips: switch to generic sys_fork() and sys_clone()

we still need the wrappers to store callee-saved registers in
pt_regs, but once that done we can jump to kernel/fork.c variants.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mips: take the "zero newsp means inherit the parent's one" to copy_thread()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mips: no magic arguments for sysm_pipe()

current_pt_regs() works just fine

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mips: don't bother with compat_sys_futex() wrappers

... it's COMPAT_SYSCALL_DEFINE now

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mips: switch to generic compat rt_sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mips: switch to generic compat sched_rr_get_interval()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mips: sigsuspend() is essentially the same as rt_sigsuspend() here

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mips: switch to generic compat rt_sigqueueinfo()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mips: switch to generic compat rt_sigpending()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mips: switch to generic compat rt_sigprocmask()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch mips to generic rt_sigsuspend(), make it unconditional

mips was the last architecture not using the generic variant.
Both native and compat variants switched to generic, which is
made unconditional now.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mips: switch to compat_sys_waitid()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mips: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Merge commit '12890d0f61fc' into arch-mips

x86: switch to generic old sigaction

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

xtensa: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

x86: switch to generic compat rt_sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

x86: switch to generic compat sched_rr_get_interval()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

x86,um: switch to generic old sigsuspend()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

x86: switch to generic compat rt_sigqueueinfo()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

x86: switch to generic compat rt_sigpending()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

x86: get rid of pt_regs argument in vm86/vm86old

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

x86: get rid of pt_regs argument in sigreturn variants

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

x86: get rid of pt_regs argument of iopl(2)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

unicore32: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

amd64: get rid of useless RESTORE_TOP_OF_STACK in stub_execve()

we are not going to return via SYSRET anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

tile: switch to generic compat rt_sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

tile: switch to generic compat rt_sigqueueinfo()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

tile: switch to generic compat rt_sig{procmask,pending}()

note that the only systems that are going to care are big-endian
64bit ones with 32bit compat enabled - little-endian bitmaps
are not sensitive to granularity.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

tile: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sparc: switch to generic compat rt_sigqueueinfo()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sparc: switch to generic compat rt_sigpending()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sparc: switch to generic compat rt_sigprocmask(2)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sparc: bury the sys_sigpause() remains

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sparc: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sh: switch to generic old sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sh: switch to generic old sigsuspend()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

score: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sh: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

s390: kill useless wrappers

COMPAT_SYSCALL_DEFINEx already does everything we need

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

s390: switch to generic old sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

s390: switch to generic compat rt_sigaction

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

s390: switch to generic compat sched_rr_get_interval()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

s390: switch to generic old sigsuspend

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

s390: switch to generic compat rt_sigqueueinfo()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

s390: switch to generic compat rt_sigpending()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

s390: switch to generic compat rt_sigprocmask(2)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

powerpc: trim the crap from syscalls.h

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

s390: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

powerpc: switch to generic old sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

powerpc: switch to generic compat rt_sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

powerpc: kill pointless wrappers

SYSCALL_DEFINE and COMPAT_SYSCALL_DEFINE do all argument normalization
we need.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

powerpc: switch to generic old sigsuspend

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

powerpc: switch to generic compat rt_sigqueueinfo()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

powerpc: switch to generic compat rt_sigpending()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

powerpc: switch to generic compat rt_sigprocmask()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

powerpc: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parisc: switch to generic compat rt_sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parisc: switch to generic compat sched_rr_get_interval()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parisc: switch to generic compat rt_sigqueueinfo()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parisc: switch to generic compat rt_sigpending()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parisc: switch to generic compat rt_sigprocmask()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

openrisc: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parisc: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mn10300: switch to generic old sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mn10300: switch to generic old sigsuspend

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

microblaze: remove debris in ptrace.c

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mn10300: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

microblaze: Move restart allowed out of block

Better not to break block which do work together.

Signed-off-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

microblaze: fix handling of multiple pending signals

We need to keep building sigframes until no pending signals remain.
Wrap do_notify_resume() calls into loops; do _not_ allow syscall
restart logics to trigger after the first iteration.

Incidentally, comments about pending signals that should (somehow)
be in r18 are pure BS.  Doesn't work that way and cannot work that
way, sorry...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

microblaze: fix the horror with restarts of sigreturn()

solution a-la arm one - pick a callee-saved register (r30), set it
non-zero when entering a syscall, have sigreturn wrapper zero it out
and pass the value in it to do_notify_resume() as "in_syscall" (actually,
"restarts allowed") argument.

Note that we don't give a damn about ret_from_fork() - return value
is not restart-worthy anyway.

Possible remaining bug: on !MMU we still have _debug_exception()
restartable.  If it hits with -ERESTART_... accidentally in r3, fun happens.
MMU does _not_ have _debug_exception() restartable.  If that's decided to
be a bug (as I strongly suspect it to be), we'll just need to replace
setting r30 to 1 with setting r30 to 0 in !MMU _debug_exception().
Up to microblaze maintainers...

[folded a fix from Michal]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

microblaze: evict the check for kernel_mode(regs) from do_notify_resume()

Only one caller hasn't done it in assembler - work_pending on !MMU.
Everything else can't reach do_notify_resume() if we are returning
to kernel mode, so move that check to that sole caller and make
do_notify_resume() reachable only when returning to userland.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

microblaze: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

m68k: switch to generic old sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

m68k: switch to generic old sigsuspend

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

m68k: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

m32r: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

hexagon: don't leave ->uc_stack uninitialized

it's used on rt_sigreturn(2)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

ia64: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

h8300: switch to generic old sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

hexagon: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

h8300: switch to generic old sigsuspend

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>