The patch titled
genirq: x86_64 irq: Dynamic irq support
has been added to the -mm tree. Its filename is
genirq-x86_64-irq-dynamic-irq-support.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: genirq: x86_64 irq: Dynamic irq support
From: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
The current implementation of create_irq() is a hack but it is the current
hack that msi.c uses, and unfortunately the ``generic'' apic msi ops depend on
this hack. Thus we are this hack of assuming irq == vector until the
depencencies in the generic irq code are removed.
Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Rajesh Shah <rajesh.shah@xxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxx>
Cc: "Protasevich, Natalie" <Natalie.Protasevich@xxxxxxxxxx>
Cc: "Luck, Tony" <tony.luck@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/x86_64/kernel/io_apic.c | 48 +++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
diff -puN arch/x86_64/kernel/io_apic.c~genirq-x86_64-irq-dynamic-irq-support arch/x86_64/kernel/io_apic.c
--- a/arch/x86_64/kernel/io_apic.c~genirq-x86_64-irq-dynamic-irq-support
+++ a/arch/x86_64/kernel/io_apic.c
@@ -2013,6 +2013,54 @@ static int __init ioapic_init_sysfs(void
device_initcall(ioapic_init_sysfs);
+#ifdef CONFIG_PCI_MSI
+/*
+ * Dynamic irq allocate and deallocation for MSI
+ */
+int create_irq(void)
+{
+ /* Hack of the day: irq == vector.
+ *
+ * Ultimately this will be be more general,
+ * and not depend on the irq to vector identity mapping.
+ * But this version is needed until msi.c can cope with
+ * the more general form.
+ */
+ int irq, vector;
+ unsigned long flags;
+ vector = assign_irq_vector(AUTO_ASSIGN);
+ irq = vector;
+
+ if (vector >= 0) {
+ struct irq_desc *desc;
+
+ spin_lock_irqsave(&vector_lock, flags);
+ vector_irq[vector] = irq;
+ irq_vector[irq] = vector;
+ spin_unlock_irqrestore(&vector_lock, flags);
+
+ set_intr_gate(vector, interrupt[irq]);
+
+ dynamic_irq_init(irq);
+ }
+ return irq;
+}
+
+void destroy_irq(unsigned int irq)
+{
+ unsigned long flags;
+ unsigned int vector;
+
+ dynamic_irq_cleanup(irq);
+
+ spin_lock_irqsave(&vector_lock, flags);
+ vector = irq_vector[irq];
+ vector_irq[vector] = -1;
+ irq_vector[irq] = 0;
+ spin_unlock_irqrestore(&vector_lock, flags);
+}
+#endif
+
/* --------------------------------------------------------------------------
ACPI-based IOAPIC Configuration
-------------------------------------------------------------------------- */
_
Patches currently in -mm which might be from ebiederm@xxxxxxxxxxxx are
add-a-sysfs-file-to-determine-if-a-kexec-kernel-is-loaded.patch
avoid-tasklist_lock-at-getrusage-for-multithreaded-case-too.patch
ptrace-document-the-locking-rules.patch
proc-fix-the-inode-number-on-proc-pid-fd.patch
proc-remove-useless-bkl-in-proc_pid_readlink.patch
proc-remove-unnecessary-and-misleading-assignments.patch
proc-simplify-the-ownership-rules-for-proc.patch
proc-replace-proc_inodetype-with-proc_inodefd.patch
proc-remove-bogus-proc_task_permission.patch
proc-kill-proc_mem_inode_operations.patch
proc-properly-filter-out-files-that-are-not-visible.patch
proc-fix-the-link-count-for-proc-pid-task.patch
proc-move-proc_maps_operations-into-task_mmuc.patch
proc-rewrite-the-proc-dentry-flush-on-exit.patch
proc-close-the-race-of-a-process-dying-durning.patch
proc-refactor-reading-directories-of-tasks.patch
proc-remove-tasklist_lock-from-proc_pid_readdir.patch
proc-remove-tasklist_lock-from-proc_pid_lookup-and.patch
proc-remove-tasklist_lock-from-proc_pid_readdir-simply-fix-first_tgid.patch
proc-make-proc_numbuf-the-buffer-size-for-holding-a.patch
proc-dont-lock-task_structs-indefinitely.patch
proc-dont-lock-task_structs-indefinitely-task_mmu-small-fixes.patch
proc-use-struct-pid-not-struct-task_ref.patch
proc-optimize-proc_check_dentry_visible.patch
proc-use-sane-permission-checks-on-the-proc-pid-fd.patch
proc-cleanup-proc_fd_access_allowed.patch
proc-remove-tasklist_lock-from-proc_task_readdir.patch
simplify-fix-first_tid.patch
cleanup-next_tid.patch
de_thread-fix-lockless-do_each_thread.patch
coredump-optimize-mm-users-traversal.patch
coredump-speedup-sigkill-sending.patch
coredump-kill-ptrace-related-stuff.patch
coredump-kill-ptrace-related-stuff-fix.patch
coredump-dont-take-tasklist_lock.patch
proc-sysctl-add-_proc_do_string-helper.patch
namespaces-add-nsproxy.patch
namespaces-add-nsproxy-dont-include-compileh.patch
namespaces-incorporate-fs-namespace-into-nsproxy.patch
namespaces-utsname-introduce-temporary-helpers.patch
namespaces-utsname-switch-to-using-uts-namespaces.patch
namespaces-utsname-switch-to-using-uts-namespaces-alpha-fix.patch
namespaces-utsname-switch-to-using-uts-namespaces-cleanup.patch
namespaces-utsname-use-init_utsname-when-appropriate.patch
namespaces-utsname-use-init_utsname-when-appropriate-cifs-update.patch
namespaces-utsname-implement-utsname-namespaces.patch
namespaces-utsname-implement-utsname-namespaces-export.patch
namespaces-utsname-implement-utsname-namespaces-dont-include-compileh.patch
namespaces-utsname-sysctl-hack.patch
namespaces-utsname-sysctl-hack-cleanup.patch
namespaces-utsname-sysctl-hack-cleanup-2.patch
namespaces-utsname-sysctl-hack-cleanup-2-fix.patch
namespaces-utsname-remove-system_utsname.patch
namespaces-utsname-implement-clone_newuts-flag.patch
uts-copy-nsproxy-only-when-needed.patch
ipc-namespace-core-fix.patch
ipc-namespace-core-unshare-fix.patch
ipc-namespace-utils-compilation-fix.patch
genirq-irq-convert-the-move_irq-flag-from-a-32bit-word-to-a-single-bit.patch
genirq-irq-add-moved_masked_irq.patch
genirq-x86_64-irq-reenable-migrating-irqs-to-other-cpus.patch
genirq-msi-simplify-msi-enable-and-disable.patch
genirq-msi-simplify-msi-enable-and-disable-fix.patch
genirq-msi-make-the-msi-boolean-tests-return-either-0-or-1.patch
genirq-msi-implement-helper-functions-read_msi_msg-and-write_msi_msg.patch
genirq-msi-refactor-the-msi_ops.patch
genirq-msi-simplify-the-msi-irq-limit-policy.patch
genirq-irq-add-a-dynamic-irq-creation-api.patch
genirq-ia64-irq-dynamic-irq-support.patch
genirq-i386-irq-dynamic-irq-support.patch
genirq-i386-irq-dynamic-irq-support-fix.patch
genirq-x86_64-irq-dynamic-irq-support.patch
genirq-msi-make-the-msi-code-irq-based-and-not-vector-based.patch
genirq-x86_64-irq-move-msi-message-composition-into-io_apicc.patch
genirq-i386-irq-move-msi-message-composition-into-io_apicc.patch
genirq-msi-only-build-msi-apicc-on-ia64.patch
genirq-x86_64-irq-remove-the-msi-assumption-that-irq-==-vector.patch
genirq-i386-irq-remove-the-msi-assumption-that-irq-==-vector.patch
genirq-i386-irq-remove-the-msi-assumption-that-irq-==-vector-fix.patch
genirq-irq-remove-msi-hacks.patch
genirq-irq-generalize-the-check-for-hardirq_bits.patch
genirq-x86_64-irq-make-the-external-irq-handlers-report-their-vector-not-the-irq-number.patch
genirq-x86_64-irq-make-vector_irq-per-cpu.patch
genirq-x86_64-irq-kill-gsi_irq_sharing.patch
genirq-x86_64-irq-kill-irq-compression.patch
genirq-irq-document-what-an-irq-is.patch
pidhash-temporary-debug-checks.patch
genirq-i386-irq-remove-the-msi-assumption-that-irq-==-vector-fix-tidies.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
