The patch titled
x86_64 io_apic: Implement irq_from_pin
has been removed from the -mm tree. Its filename was
x86_64-io_apic-implement-irq_from_pin.patch
This patch was dropped because it is obsolete
------------------------------------------------------
Subject: x86_64 io_apic: Implement irq_from_pin
From: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Another helper needed for guessing the routing of the timer irq.
irq_from_pin looks at the irq_2_pin mapping and figures out which irq is
connected to a given apic and pin combination.
We need to know this to avoid guessing an apic pin that is already in use by
another irq.
Despite the nested loops this is O(N) walk through the irq_2_pin data
structure.
Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Cc: "Yinghai Lu" <yinghai.lu@xxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/x86_64/kernel/io_apic.c | 14 ++++++++++++++
1 files changed, 14 insertions(+)
diff -puN arch/x86_64/kernel/io_apic.c~x86_64-io_apic-implement-irq_from_pin arch/x86_64/kernel/io_apic.c
--- a/arch/x86_64/kernel/io_apic.c~x86_64-io_apic-implement-irq_from_pin
+++ a/arch/x86_64/kernel/io_apic.c
@@ -262,6 +262,20 @@ static void set_ioapic_affinity_irq(unsi
}
#endif
+static int irq_from_pin(int apic, int pin)
+{
+ int irq;
+ for (irq = 0; irq < NR_IRQS; irq++) {
+ struct irq_pin_list *entry = irq_2_pin + irq;
+ while (entry->next && ((entry->apic != apic) || (entry->pin != pin)))
+ entry = irq_2_pin + entry->next;
+
+ if ((entry->pin == pin) && (entry->apic == apic))
+ return irq;
+ }
+ return -1;
+}
+
/*
* The common case is 1:1 IRQ<->pin mappings. Sometimes there are
* shared ISA-space IRQs, so we have to support them. We are super
_
Patches currently in -mm which might be from ebiederm@xxxxxxxxxxxx are
origin.patch
kthread-api-conversion-for-dvb_frontend-and-av7110.patch
genapic-optimize-fix-apic-mode-setup-2.patch
genapic-always-use-physical-delivery-mode-on-8-cpus.patch
genapic-remove-es7000-workaround.patch
genapic-remove-clustered-apic-mode.patch
genapic-default-to-physical-mode-on-hotplug-cpu-kernels.patch
i386-make-apic-probe-function-non-init.patch
modpost-add-more-symbols-to-whitelist-pattern2.patch
modpost-whitelist-reference-to-more-symbols-pattern-3.patch
x86_64-io_apic-implement-irq_from_pin.patch
x86_64-io_apic-implment-update_irq0_entry.patch
x86_64-ioapic-improve-the-heuristics-for-when-check_timer-fails.patch
x86_64-ioapic-improve-the-heuristics-for-when-check_timer-fails-fix.patch
vt-refactor-console-sak-processing.patch
sysctl_ms_jiffies-fix-oldlen-semantics.patch
9p-use-kthread_stop-instead-of-sending-a-sigkill.patch
procfs-fix-race-between-proc_readdir-and-remove_proc_entry.patch
procfs-fix-race-between-proc_readdir-and-remove_proc_entry-fix.patch
kill_pid_info-kill-acquired_tasklist_lock.patch
clone-flag-clone_parent_tidptr-leaves-invalid-results-in-memory.patch
tty-make-__proc_set_tty-static.patch
tty-clarify-disassociate_ctty.patch
tty-fix-the-locking-for-signal-session-in-disassociate_ctty.patch
signal-use-kill_pgrp-not-kill_pg-in-the-sunos-compatibility-code.patch
signal-rewrite-kill_something_info-so-it-uses-newer-helpers.patch
pid-make-session_of_pgrp-use-struct-pid-instead-of-pid_t.patch
pid-use-struct-pid-for-talking-about-process-groups-in-exitc.patch
pid-replace-is_orphaned_pgrp-with-is_current_pgrp_orphaned.patch
tty-update-the-tty-layer-to-work-with-struct-pid.patch
pid-replace-do-while_each_task_pid-with-do-while_each_pid_task.patch
pid-remove-now-unused-do_each_task_pid-and-while_each_task_pid.patch
pid-remove-the-now-unused-kill_pg-kill_pg_info-and-__kill_pg_info.patch
i386-apic-clean-up-the-apic-code.patch
i386-apic-rework-and-fix-local-apic-calibration.patch
dynticks-i386-prepare-nmi-watchdog.patch
edac-e752x-bit-mask-fix.patch
edac-e752x-byte-access-fix.patch
edac-k8-driver-coding-tidy.patch
sched2-sched-domain-sysctl-use-ctl_unnumbered.patch
mm-implement-swap-prefetching-use-ctl_unnumbered.patch
nsproxy-externalizes-exit_task_namespaces.patch
user-namespace-add-the-framework.patch
user-namespace-add-the-framework-fix.patch
user-ns-add-user_namespace-ptr-to-vfsmount.patch
user-ns-hook-permission.patch
user-ns-prepare-copy_tree-copy_mnt-and-their-callers-to-handle-errs.patch
user-ns-prepare-copy_tree-copy_mnt-and-their-callers-to-handle-errs-fix.patch
user-ns-implement-shared-mounts.patch
user_ns-handle-file-sigio.patch
user-ns-implement-user-ns-unshare.patch
user-ns-implement-user-ns-unshare-tidy.patch
readahead-sysctl-parameters-use-ctl_unnumbered.patch
vdso-print-fatal-signals-use-ctl_unnumbered.patch
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