Talos™ II Linux sources for OpenPOWER https://git.raptorcs.com/git/talos-op-linux/atom?h=v3.1-rc3 2011-08-15T21:35:19+00:00 2011-08-15T21:35:19+00:00 Mikael Pettersson mikpe@it.uu.se 2011-08-15T10:11:50+00:00 urn:sha1:3f6aa0b113846a8628baa649af422cfc6fb1d786 The sparc32 version of arch_write_unlock() is just a plain assignment. Unfortunately this allows the compiler to schedule side-effects in a protected region to occur after the HW-level unlock, which is broken. E.g., the following trivial test case gets miscompiled: #include <linux/spinlock.h> rwlock_t lock; int counter; void foo(void) { write_lock(&lock); ++counter; write_unlock(&lock); } Fixed by adding a compiler memory barrier to arch_write_unlock(). The sparc64 version combines the barrier and assignment into a single asm(), and implements the operation as a static inline, so that's what I did too. Compile-tested with sparc32_defconfig + CONFIG_SMP=y. Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net> 2011-08-15T21:35:18+00:00 Mikael Pettersson mikpe@it.uu.se 2011-08-15T10:10:31+00:00 urn:sha1:a0fba3eb059e73fed2d376a901f8117734c12f1f The sparc64 spinlock_64.h contains a number of operations defined first as static inline functions, and then as macros with the same names and parameters as the functions. Maybe this was needed at some point in the past, but now nothing seems to depend on these macros (checked with a recursive grep looking for ifdefs on these names). Other archs don't define these identity-macros. So this patch deletes these unnecessary macros. Compile-tested with sparc64_defconfig. Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net> 2011-08-05T16:42:36+00:00 Linus Torvalds torvalds@linux-foundation.org 2011-08-05T16:42:36+00:00 urn:sha1:8cd290a07d095f3b354e3448bcd7757393c29cd5 * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc: sparc: Size mondo queues more sanely. sparc: Access kernel TSB using physical addressing when possible. sparc: Fix __atomic_add_unless() return value. sparc: use kbuild-generic support for true asm-generic header files sparc: Use popc when possible for ffs/__ffs/ffz. sparc: Set reboot-cmd using reboot data hypervisor call if available. sparc: Add some missing hypervisor API groups. sparc: Use hweight64() in popc emulation. sparc: Use popc if possible for hweight routines. sparc: Minor tweaks to Niagara page copy/clear. sparc: Sanitize cpu feature detection and reporting. 2011-08-05T07:53:57+00:00 David S. Miller davem@davemloft.net 2011-08-05T07:53:57+00:00 urn:sha1:9076d0e7e02b98f7a65df10d1956326c8d8ba61a On sun4v this is basically required since we point the hypervisor and the TSB walking hardware at these tables using physical addressing too. Signed-off-by: David S. Miller <davem@davemloft.net> 2011-08-04T08:35:12+00:00 Sam Ravnborg sam@ravnborg.org 2011-08-04T08:35:12+00:00 urn:sha1:fabb5bd96d060da961d74531a0900da4da5ad2d4 Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net> 2011-08-03T04:28:53+00:00 David S. Miller davem@davemloft.net 2011-08-03T03:23:34+00:00 urn:sha1:56d205cc5c0a3032a605121d4253e111193bf923 Signed-off-by: David S. Miller <davem@davemloft.net> 2011-08-03T04:28:52+00:00 David S. Miller davem@davemloft.net 2011-08-02T06:27:17+00:00 urn:sha1:ea5e7447ea9d555558e0f13798f5143dd51a915a Signed-off-by: David S. Miller <davem@davemloft.net> 2011-08-03T04:28:51+00:00 David S. Miller davem@davemloft.net 2011-08-02T05:45:18+00:00 urn:sha1:e2eb9f8158ead43a88c0f0b4d74257b1be938a18 Signed-off-by: David S. Miller <davem@davemloft.net> 2011-08-03T04:28:50+00:00 David S. Miller davem@davemloft.net 2011-07-29T16:42:07+00:00 urn:sha1:ef7c4d4675d2a9206f913f26ca1a5cd41bff9d41 Just like powerpc, we code patch at boot time. Signed-off-by: David S. Miller <davem@davemloft.net> 2011-07-30T06:35:05+00:00 Linus Torvalds torvalds@linux-foundation.org 2011-07-30T06:35:05+00:00 urn:sha1:f85f19de90a9997583bb26e6f1f9297a4e152c18 * 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: PCI: remove printks about disabled bridge windows PCI: fold pci_calc_resource_flags() into decode_bar() PCI: treat mem BAR type "11" (reserved) as 32-bit, not 64-bit, BAR PCI: correct pcie_set_readrq write size PCI: pciehp: change wait time for valid configuration access x86/PCI: Preserve existing pci=bfsort whitelist for Dell systems PCI: ARI is a PCIe v2 feature x86/PCI: quirks: Use pci_dev->revision PCI: Make the struct pci_dev * argument of pci_fixup_irqs const. PCI hotplug: cpqphp: use pci_dev->vendor PCI hotplug: cpqphp: use pci_dev->subsystem_{vendor|device} x86/PCI: config space accessor functions should not ignore the segment argument PCI: Assign values to 'pci_obff_signal_type' enumeration constants x86/PCI: reduce severity of host bridge window conflict warnings PCI: enumerate the PCI device only removed out PCI hieratchy of OS when re-scanning PCI PCI: PCIe AER: add aer_recover_queue x86/PCI: select direct access mode for mmconfig option PCI hotplug: Rename is_ejectable which also exists in dock.c