kernel.git/arch/parisc/include, branch linux-2.6.30.y

parisc: fix ldcw inline assembler

2009-07-30T21:40:07Z

commit 7d17e2763129ea307702fcdc91f6e9d114b65c2d upstream. There are two reasons to expose the memory *a in the asm: 1) To prevent the compiler from discarding a preceeding write to *a, and 2) to prevent it from caching *a in a register over the asm. The change has had a few days testing with a SMP build of 2.6.22.19 running on a rp3440. This patch is about the correctness of the __ldcw() macro itself. The use of the macro should be confined to small inline functions to try to limit the effect of clobbering memory on GCC's optimization of loads and stores. Signed-off-by: Dave Anglin Signed-off-by: Helge Deller Signed-off-by: Kyle McMartin Signed-off-by: Greg Kroah-Hartman

parisc: ensure broadcast tlb purge runs single threaded

2009-07-30T21:40:07Z

commit e82a3b75127188f20c7780bec580e148beb29da7 upstream. The TLB flushing functions on hppa, which causes PxTLB broadcasts on the system bus, needs to be protected by irq-safe spinlocks to avoid irq handlers to deadlock the kernel. The deadlocks only happened during I/O intensive loads and triggered pretty seldom, which is why this bug went so long unnoticed. Signed-off-by: Helge Deller [edited to use spin_lock_irqsave on UP as well since we'd been locking there all this time anyway, --kyle] Signed-off-by: Kyle McMartin Signed-off-by: Greg Kroah-Hartman

Merge git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6

2009-04-03T16:52:04Z

* git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6: (23 commits) parisc: move dereference_function_descriptor to process.c parisc: Move kernel Elf_Fdesc define to parisc: fix build when ARCH_HAS_KMAP parisc: fix "make tar-pkg" parisc: drivers: fix warnings parisc: select BUG always parisc: asm/pdc.h should include asm/page.h parisc: led: remove proc_dir_entry::owner parisc: fix macro expansion in atomic.h parisc: iosapic: fix build breakage parisc: oops_enter()/oops_exit() in die() parisc: document light weight syscall ABI parisc: blink all or loadavg LEDs on oops parisc: add ftrace (function and graph tracer) functionality parisc: simplify sys_clone() parisc: add LATENCYTOP_SUPPORT and CONFIG_STACKTRACE_SUPPORT parisc: allow to build with 16k default kernel page size parisc: expose 32/64-bit capabilities in cpuinfo parisc: use constants instead of numbers in assembly parisc: fix usage of 32bit PTE page table entries on 32bit kernels ...

Allow rwlocks to re-enable interrupts

2009-04-03T02:05:11Z

Pass the original flags to rwlock arch-code, so that it can re-enable interrupts if implemented for that architecture. Initially, make __raw_read_lock_flags and __raw_write_lock_flags stubs which just do the same thing as non-flags variants. Signed-off-by: Petr Tesarik Signed-off-by: Robin Holt Acked-by: Peter Zijlstra Cc: Acked-by: Ingo Molnar Cc: "Luck, Tony" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

parisc: Move kernel Elf_Fdesc define to

2009-04-02T04:16:24Z

elf.h probably won't be exported to userspace, but play it safe and cram it in a #ifdef __KERNEL__ guard. Signed-off-by: Kyle McMartin

parisc: fix build when ARCH_HAS_KMAP

2009-04-02T02:42:53Z

When we build for PA8X00, we define ARCH_HAS_KMAP, which results in the kmap_types.h include in highmem.h getting skipped... In file included from include/linux/pagemap.h:10, from include/linux/mempolicy.h:62, from init/main.c:52: include/linux/highmem.h:196: warning: 'enum km_type' declared inside parameter list include/linux/highmem.h:196: warning: its scope is only this definition or declaration, which is probably not what you want include/linux/highmem.h:196: error: parameter 1 ('type') has incomplete type Signed-off-by: Kyle McMartin

Merge branch 'rusty-cpumask-parisc' into parisc

2009-04-02T01:43:14Z

parisc: asm/pdc.h should include asm/page.h

2009-04-02T00:20:15Z

Fixes this build error: arch/parisc/kernel/pdc_cons.c:117: error: '__PAGE_OFFSET' undeclared Signed-off-by: Alexander Beregalov Signed-off-by: Kyle McMartin

parisc: fix macro expansion in atomic.h

2009-03-31T03:10:37Z

Signed-off-by: James Bottomley Signed-off-by: Kyle McMartin

parisc: add ftrace (function and graph tracer) functionality

2009-03-31T02:51:34Z

This patch adds the ftrace debugging functionality to the parisc kernel. It will currently only work with 64bit kernels, because the gcc options -pg and -ffunction-sections can't be enabled at the same time and -ffunction-sections is still needed to be able to link 32bit kernels. Signed-off-by: Helge Deller Signed-off-by: Kyle McMartin