linux/kernel/compat.c, branch v3.9

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2013-02-24T02:50:11Z

Pull signal handling cleanups from Al Viro: "This is the first pile; another one will come a bit later and will contain SYSCALL_DEFINE-related patches. - a bunch of signal-related syscalls (both native and compat) unified. - a bunch of compat syscalls switched to COMPAT_SYSCALL_DEFINE (fixing several potential problems with missing argument validation, while we are at it) - a lot of now-pointless wrappers killed - a couple of architectures (cris and hexagon) forgot to save altstack settings into sigframe, even though they used the (uninitialized) values in sigreturn; fixed. - microblaze fixes for delivery of multiple signals arriving at once - saner set of helpers for signal delivery introduced, several architectures switched to using those." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (143 commits) x86: convert to ksignal sparc: convert to ksignal arm: switch to struct ksignal * passing alpha: pass k_sigaction and siginfo_t using ksignal pointer burying unused conditionals make do_sigaltstack() static arm64: switch to generic old sigaction() (compat-only) arm64: switch to generic compat rt_sigaction() arm64: switch compat to generic old sigsuspend arm64: switch to generic compat rt_sigqueueinfo() arm64: switch to generic compat rt_sigpending() arm64: switch to generic compat rt_sigprocmask() arm64: switch to generic sigaltstack sparc: switch to generic old sigsuspend sparc: COMPAT_SYSCALL_DEFINE does all sign-extension as well as SYSCALL_DEFINE sparc: kill sign-extending wrappers for native syscalls kill sparc32_open() sparc: switch to use of generic old sigaction sparc: switch sys_compat_rt_sigaction() to COMPAT_SYSCALL_DEFINE mips: switch to generic sys_fork() and sys_clone() ...

compat: return -EFAULT on error in waitid()

2013-02-22T01:22:16Z

The copy_to_user() call returns the number of bytes remaining but we want to return -EFAULT on error. Fixes "x32: fix waitid()" Signed-off-by: Dan Carpenter Cc: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

switch compat_sys_sched_rr_get_interval to COMPAT_SYSCALL_DEFINE

2013-02-03T20:09:22Z

... and make it unconditional - we want the sucker on all biarch platforms, really. All kinds of wrappers and private implementations can go now; fortunately, they don't cause name conflicts, so we can do that one first without any bisect hazards. Signed-off-by: Al Viro

switch rt_tgsigqueueinfo to COMPAT_SYSCALL_DEFINE

2013-02-03T20:09:21Z

C ABI violations on sparc, ppc and mips Signed-off-by: Al Viro

switch compat_sys_sigprocmask to COMPAT_SYSCALL_DEFINE

2013-02-03T20:09:21Z

In principle, C ABI violation on ppc and mips... Signed-off-by: Al Viro

switch compat_sys_rt_sigtimedwait to COMPAT_SYSCALL_DEFINE

2013-02-03T20:09:20Z

Signed-off-by: Al Viro

generic compat_sys_rt_sigprocmask()

2013-02-03T20:09:19Z

conditional on GENERIC_COMPAT_RT_SIGPROCMASK; by the end of that series it will become the same thing as COMPAT and conditional will die out. Signed-off-by: Al Viro

consolidate rt_sigsuspend()

2013-02-03T20:09:18Z

* pull compat version alongside with the native one * make little-endian compat variant just call the native * don't bother with separate conditional for compat (both native and compat are going to become unconditional very soon). Signed-off-by: Al Viro

switch compat_sys_[gs]etitimer(2) to COMPAT_SYSCALL_DEFINE

2013-02-03T20:09:17Z

again, strictly speaking we are in nasal daemon territory on ppc and mips - we need to sign-extend int arguments. Signed-off-by: Al Viro

x32: fix sigtimedwait

2012-12-26T06:15:03Z

It needs 64bit timespec. As it is, we end up truncating the timeout to whole seconds; usually it doesn't matter, but for having all sub-second timeouts truncated to one jiffy is visibly wrong. Signed-off-by: Al Viro