From 615d0ebbc782b67296e3226c293f520f93f93515 Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Tue, 2 Feb 2010 16:49:04 -0500 Subject: kprobes: Disable booster when CONFIG_PREEMPT=y Disable kprobe booster when CONFIG_PREEMPT=y at this time, because it can't ensure that all kernel threads preempted on kprobe's boosted slot run out from the slot even using freeze_processes(). The booster on preemptive kernel will be resumed if synchronize_tasks() or something like that is introduced. Signed-off-by: Masami Hiramatsu Cc: systemtap Cc: DLE Cc: Ananth N Mavinakayanahalli Cc: Frederic Weisbecker Cc: Jim Keniston Cc: Mathieu Desnoyers Cc: Steven Rostedt LKML-Reference: <20100202214904.4694.24330.stgit@dhcp-100-2-132.bos.redhat.com> Signed-off-by: Ingo Molnar --- arch/ia64/kernel/kprobes.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/ia64') diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c index 9adac441ac9b..7026b29e277a 100644 --- a/arch/ia64/kernel/kprobes.c +++ b/arch/ia64/kernel/kprobes.c @@ -870,7 +870,7 @@ static int __kprobes pre_kprobes_handler(struct die_args *args) return 1; ss_probe: -#if !defined(CONFIG_PREEMPT) || defined(CONFIG_FREEZER) +#if !defined(CONFIG_PREEMPT) if (p->ainsn.inst_flag == INST_FLAG_BOOSTABLE && !p->post_handler) { /* Boost up -- we can execute copied instructions directly */ ia64_psr(regs)->ri = p->ainsn.slot; -- cgit v1.2.2 From 49bf83a45fc677db1ed44d0e072e6aaeabe4e124 Mon Sep 17 00:00:00 2001 From: Len Brown Date: Tue, 16 Feb 2010 03:45:45 -0500 Subject: ACPI: fix "acpi=ht" boot option We broke "acpi=ht" in 2.6.32 by disabling MADT parsing for acpi=disabled. e5b8fc6ac158f65598f58dba2c0d52ba3b412f52 This also broke systems which invoked acpi=ht via DMI blacklist. acpi=ht is a really ugly hack, but restore it for those that still use it. http://bugzilla.kernel.org/show_bug.cgi?id=14886 Signed-off-by: Len Brown --- arch/ia64/include/asm/acpi.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/ia64') diff --git a/arch/ia64/include/asm/acpi.h b/arch/ia64/include/asm/acpi.h index 7ae58892ba8d..e97b255d97bc 100644 --- a/arch/ia64/include/asm/acpi.h +++ b/arch/ia64/include/asm/acpi.h @@ -94,6 +94,7 @@ ia64_acpi_release_global_lock (unsigned int *lock) #define acpi_noirq 0 /* ACPI always enabled on IA64 */ #define acpi_pci_disabled 0 /* ACPI PCI always enabled on IA64 */ #define acpi_strict 1 /* no ACPI spec workarounds on IA64 */ +#define acpi_ht 0 /* no HT-only mode on IA64 */ #endif #define acpi_processor_cstate_check(x) (x) /* no idle limits on IA64 :) */ static inline void disable_acpi(void) { } -- cgit v1.2.2 From b26b2d494b659f988b4d75eb394dfa0ddac415c9 Mon Sep 17 00:00:00 2001 From: Dominik Brodowski Date: Fri, 1 Jan 2010 17:40:49 +0100 Subject: resource/PCI: align functions now return start of resource As suggested by Linus, align functions should return the start of a resource, not void. An update of "res->start" is no longer necessary. Cc: Bjorn Helgaas Cc: Yinghai Lu Signed-off-by: Dominik Brodowski Signed-off-by: Jesse Barnes --- arch/ia64/pci/pci.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch/ia64') diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c index df639db779f9..ef574cd311d1 100644 --- a/arch/ia64/pci/pci.c +++ b/arch/ia64/pci/pci.c @@ -547,10 +547,11 @@ pcibios_disable_device (struct pci_dev *dev) acpi_pci_irq_disable(dev); } -void +resource_size_t pcibios_align_resource (void *data, struct resource *res, resource_size_t size, resource_size_t align) { + return res->start; } /* -- cgit v1.2.2 From 3b7a17fcdae532d29dffab9d564a28be08960988 Mon Sep 17 00:00:00 2001 From: Dominik Brodowski Date: Fri, 1 Jan 2010 17:40:50 +0100 Subject: resource/PCI: mark struct resource as const Now that we return the new resource start position, there is no need to update "struct resource" inside the align function. Therefore, mark the struct resource as const. Cc: Bjorn Helgaas Cc: Yinghai Lu Signed-off-by: Dominik Brodowski Signed-off-by: Jesse Barnes --- arch/ia64/pci/pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/ia64') diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c index ef574cd311d1..783c83bb2b49 100644 --- a/arch/ia64/pci/pci.c +++ b/arch/ia64/pci/pci.c @@ -548,7 +548,7 @@ pcibios_disable_device (struct pci_dev *dev) } resource_size_t -pcibios_align_resource (void *data, struct resource *res, +pcibios_align_resource (void *data, const struct resource *res, resource_size_t size, resource_size_t align) { return res->start; -- cgit v1.2.2 From 89a74ecccd1f78e51faf6287e5c0e93a92ac096e Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Tue, 23 Feb 2010 10:24:31 -0700 Subject: PCI: add pci_bus_for_each_resource(), remove direct bus->resource[] refs No functional change; this converts loops that iterate from 0 to PCI_BUS_NUM_RESOURCES through pci_bus resource[] table to use the pci_bus_for_each_resource() iterator instead. This doesn't change the way resources are stored; it merely removes dependencies on the fact that they're in a table. Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- arch/ia64/pci/pci.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'arch/ia64') diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c index 783c83bb2b49..89f957ca3eb2 100644 --- a/arch/ia64/pci/pci.c +++ b/arch/ia64/pci/pci.c @@ -452,13 +452,12 @@ EXPORT_SYMBOL(pcibios_bus_to_resource); static int __devinit is_valid_resource(struct pci_dev *dev, int idx) { unsigned int i, type_mask = IORESOURCE_IO | IORESOURCE_MEM; - struct resource *devr = &dev->resource[idx]; + struct resource *devr = &dev->resource[idx], *busr; if (!dev->bus) return 0; - for (i=0; ibus->resource[i]; + pci_bus_for_each_resource(dev->bus, busr, i) { if (!busr || ((busr->flags ^ devr->flags) & type_mask)) continue; if ((devr->start) && (devr->start >= busr->start) && -- cgit v1.2.2 From 2fe2abf896c1e7a0ee65faaf3ef0ce654848abbd Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Tue, 23 Feb 2010 10:24:36 -0700 Subject: PCI: augment bus resource table with a list Previously we used a table of size PCI_BUS_NUM_RESOURCES (16) for resources forwarded to a bus by its upstream bridge. We've increased this size several times when the table overflowed. But there's no good limit on the number of resources because host bridges and subtractive decode bridges can forward any number of ranges to their secondary buses. This patch reduces the table to only PCI_BRIDGE_RESOURCE_NUM (4) entries, which corresponds to the number of windows a PCI-to-PCI (3) or CardBus (4) bridge can positively decode. Any additional resources, e.g., PCI host bridge windows or subtractively-decoded regions, are kept in a list. I'd prefer a single list rather than this split table/list approach, but that requires simultaneous changes to every architecture. This approach only requires immediate changes where we set up (a) host bridges with more than four windows and (b) subtractive-decode P2P bridges, and we can incrementally change other architectures to use the list. Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- arch/ia64/pci/pci.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) (limited to 'arch/ia64') diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c index 89f957ca3eb2..64aff520b899 100644 --- a/arch/ia64/pci/pci.c +++ b/arch/ia64/pci/pci.c @@ -320,9 +320,9 @@ static __devinit acpi_status add_window(struct acpi_resource *res, void *data) static void __devinit pcibios_setup_root_windows(struct pci_bus *bus, struct pci_controller *ctrl) { - int i, j; + int i; - j = 0; + pci_bus_remove_resources(bus); for (i = 0; i < ctrl->windows; i++) { struct resource *res = &ctrl->window[i].resource; /* HP's firmware has a hack to work around a Windows bug. @@ -330,13 +330,7 @@ pcibios_setup_root_windows(struct pci_bus *bus, struct pci_controller *ctrl) if ((res->flags & IORESOURCE_MEM) && (res->end - res->start < 16)) continue; - if (j >= PCI_BUS_NUM_RESOURCES) { - dev_warn(&bus->dev, - "ignoring host bridge window %pR (no space)\n", - res); - continue; - } - bus->resource[j++] = res; + pci_bus_add_resource(bus, res, 0); } } -- cgit v1.2.2 From 7bc5e3f2be32ae6fb0c74cd0f707f986b3a01a26 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Tue, 23 Feb 2010 10:24:41 -0700 Subject: x86/PCI: use host bridge _CRS info by default on 2008 and newer machines The main benefit of using ACPI host bridge window information is that we can do better resource allocation in systems with multiple host bridges, e.g., http://bugzilla.kernel.org/show_bug.cgi?id=14183 Sometimes we need _CRS information even if we only have one host bridge, e.g., https://bugs.launchpad.net/ubuntu/+source/linux/+bug/341681 Most of these systems are relatively new, so this patch turns on "pci=use_crs" only on machines with a BIOS date of 2008 or newer. Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- arch/ia64/include/asm/acpi.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/ia64') diff --git a/arch/ia64/include/asm/acpi.h b/arch/ia64/include/asm/acpi.h index e97b255d97bc..93997bd5edc3 100644 --- a/arch/ia64/include/asm/acpi.h +++ b/arch/ia64/include/asm/acpi.h @@ -98,6 +98,7 @@ ia64_acpi_release_global_lock (unsigned int *lock) #endif #define acpi_processor_cstate_check(x) (x) /* no idle limits on IA64 :) */ static inline void disable_acpi(void) { } +static inline void pci_acpi_crs_quirks(void) { } const char *acpi_get_sysname (void); int acpi_request_vector (u32 int_type); -- cgit v1.2.2 From f7624c97b8e5bca49be7854309550bff8ce98c47 Mon Sep 17 00:00:00 2001 From: Hedi Berriche Date: Tue, 23 Feb 2010 23:58:49 +0000 Subject: [IA64] Fix broken sn2 build Revert the change made to arch/ia64/sn/kernel/setup.c by commit 204fba4aa303ea4a7bb726a539bf4a5b9e3203d0 as it breaks the build. Fixing the build the b94b08081fcecf83fa690d6c5664f6316fe72208 way breaks xpc because genksyms then fails to generate an CRC for per_cpu____sn_cnodeid_to_nasid because of limitations in the generic genksyms code. Signed-off-by: Hedi Berriche Signed-off-by: Tony Luck --- arch/ia64/sn/kernel/setup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/ia64') diff --git a/arch/ia64/sn/kernel/setup.c b/arch/ia64/sn/kernel/setup.c index ece1bf994499..e456f062f241 100644 --- a/arch/ia64/sn/kernel/setup.c +++ b/arch/ia64/sn/kernel/setup.c @@ -71,7 +71,7 @@ EXPORT_SYMBOL(sn_rtc_cycles_per_second); DEFINE_PER_CPU(struct sn_hub_info_s, __sn_hub_info); EXPORT_PER_CPU_SYMBOL(__sn_hub_info); -DEFINE_PER_CPU(short [MAX_COMPACT_NODES], __sn_cnodeid_to_nasid); +DEFINE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_COMPACT_NODES]); EXPORT_PER_CPU_SYMBOL(__sn_cnodeid_to_nasid); DEFINE_PER_CPU(struct nodepda_s *, __sn_nodepda); -- cgit v1.2.2