kernel.git/arch/parisc/include, branch linux-2.6.34.y

compat: Make compat_alloc_user_space() incorporate the access_ok()

2011-01-06T23:07:49Z

commit c41d68a513c71e35a14f66d71782d27a79a81ea6 upstream. compat_alloc_user_space() expects the caller to independently call access_ok() to verify the returned area. A missing call could introduce problems on some architectures. This patch incorporates the access_ok() check into compat_alloc_user_space() and also adds a sanity check on the length. The existing compat_alloc_user_space() implementations are renamed arch_compat_alloc_user_space() and are used as part of the implementation of the new global function. This patch assumes NULL will cause __get_user()/__put_user() to either fail or access userspace on all architectures. This should be followed by checking the return value of compat_access_user_space() for NULL in the callers, at which time the access_ok() in the callers can also be removed. Reported-by: Ben Hawkes Signed-off-by: H. Peter Anvin Acked-by: Benjamin Herrenschmidt Acked-by: Chris Metcalf Acked-by: David S. Miller Acked-by: Ingo Molnar Acked-by: Thomas Gleixner Acked-by: Tony Luck Cc: Andrew Morton Cc: Arnd Bergmann Cc: Fenghua Yu Cc: H. Peter Anvin Cc: Heiko Carstens Cc: Helge Deller Cc: James Bottomley Cc: Kyle McMartin Cc: Martin Schwidefsky Cc: Paul Mackerras Cc: Ralf Baechle Signed-off-by: Paul Gortmaker

pci-dma: add linux/pci-dma.h to linux/pci.h

2010-03-12T23:52:42Z

All the architectures properly set NEED_DMA_MAP_STATE now so we can safely add linux/pci-dma.h to linux/pci.h and remove the linux/pci-dma.h inclusion in arch's asm/pci.h Signed-off-by: FUJITA Tomonori Acked-by: Arnd Bergmann Cc: Jesse Barnes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

pci-dma: parisc: use include/linux/pci-dma.h

2010-03-12T23:52:41Z

Signed-off-by: FUJITA Tomonori Acked-by: Kyle McMartin Cc: Helge Deller Cc: James Bottomley Cc: Jesse Barnes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ptrace: move user_enable_single_step & co prototypes to linux/ptrace.h

2010-03-12T23:52:38Z

While in theory user_enable_single_step/user_disable_single_step/ user_enable_blockstep could also be provided as an inline or macro there's no good reason to do so, and having the prototype in one places keeps code size and confusion down. Roland said: The original thought there was that user_enable_single_step() et al might well be only an instruction or three on a sane machine (as if we have any of those!), and since there is only one call site inlining would be beneficial. But I agree that there is no strong reason to care about inlining it. As to the arch changes, there is only one thought I'd add to the record. It was always my thinking that for an arch where PTRACE_SINGLESTEP does text-modifying breakpoint insertion, user_enable_single_step() should not be provided. That is, arch_has_single_step()=>true means that there is an arch facility with "pure" semantics that does not have any unexpected side effects. Inserting a breakpoint might do very unexpected strange things in multi-threaded situations. Aside from that, it is a peculiar side effect that user_{enable,disable}_single_step() should cause COW de-sharing of text pages and so forth. For PTRACE_SINGLESTEP, all these peculiarities are the status quo ante for that arch, so having arch_ptrace() itself do those is one thing. But for building other things in the future, it is nicer to have a uniform "pure" semantics that arch-independent code can expect. OTOH, all such arch issues are really up to the arch maintainer. As of today, there is nothing but ptrace using user_enable_single_step() et al so it's a distinction without a practical difference. If/when there are other facilities that use user_enable_single_step() and might care, the affected arch's can revisit the question when someone cares about the quality of the arch support for said new facility. Signed-off-by: Christoph Hellwig Cc: Oleg Nesterov Cc: Roland McGrath Acked-by: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

improve sys_newuname() for compat architectures

2010-03-12T23:52:32Z

On an architecture that supports 32-bit compat we need to override the reported machine in uname with the 32-bit value. Instead of doing this separately in every architecture introduce a COMPAT_UTS_MACHINE define in and apply it directly in sys_newuname(). Signed-off-by: Christoph Hellwig Cc: Ralf Baechle Cc: Benjamin Herrenschmidt Cc: Paul Mundt Cc: Jeff Dike Cc: Hirokazu Takata Cc: Thomas Gleixner Cc: Ingo Molnar Cc: H. Peter Anvin Cc: Al Viro Cc: Arnd Bergmann Cc: Heiko Carstens Cc: Martin Schwidefsky Cc: "Luck, Tony" Cc: James Morris Cc: Andreas Schwab Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

parisc: Simplify param.h by including

2010-03-06T22:54:10Z

Signed-off-by: Robert P. J. Day Signed-off-by: Kyle McMartin

parisc: drop unnecessary cast in __ldcw_align() macro

2010-03-06T22:54:10Z

__ldcw_align() can directly access the slock member of struct arch_spinlock_t instead of using an ugly cast. Signed-off-by: Helge Deller Signed-off-by: Kyle McMartin

parisc: add strict copy size checks (v2)

2010-03-06T22:54:09Z

Add CONFIG_DEBUG_STRICT_USER_COPY_CHECKS, copied from the x86 implementation. Tested with 32 and 64bit kernel. Signed-off-by: Helge Deller Signed-off-by: Kyle McMartin

parisc: ditto sys_accept4

2010-03-06T22:54:09Z

tested with test_accept4.c from de11defebf00007677fb7ee91d9b089b78786fbb Signed-off-by: Kyle McMartin

parisc: wire up sys_recvmmsg

2010-03-06T22:54:09Z

Signed-off-by: Helge Deller Signed-off-by: Kyle McMartin