fix: genirq: Restrict export of irq_to_desc() (v5.11)

See upstream commit:

  commit 64a1b95bb9fe3ec76e1a2cd803eff06389341ae4
  Author: Thomas Gleixner <tglx@linutronix.de>
  Date:   Thu Dec 10 20:26:06 2020 +0100

    genirq: Restrict export of irq_to_desc()

    No more (ab)use in drivers finally. There is still the modular build of
    PPC/KVM which needs it, so restrict it to this case which still makes it
    unavailable for most drivers.

Link: https://lore.kernel.org/r/20201210194045.551428291@linutronix.de
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ie5a2af2f02ade07c73e1c7a8aa0fb155280b3d8b

diff --git a/wrapper/irqdesc.c b/wrapper/irqdesc.c
index 02c44c8001abe3273fe54d9681ed6a91dbc386ad..d8858c439054390f3e4036e8e82d89475e93348f 100644 (file)
--- a/wrapper/irqdesc.c
+++ b/wrapper/irqdesc.c
@@ -4,7 +4,7 @@
  *
  * wrapper around irq_to_desc. Using KALLSYMS to get its address when
  * available, else we need to have a kernel that exports this function to GPL
- * modules. This export was added to the 3.4 kernels.
+ * modules. This export was added to the 3.4 kernels and removed in 5.11.
  *
  * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  */
@@ -12,8 +12,9 @@
 #include <lttng-kernel-version.h>
 #include <linux/module.h>
 
-#if (defined(CONFIG_KALLSYMS) \
-       && (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0)))
+#if (defined(CONFIG_KALLSYMS) && \
+       ((LINUX_VERSION_CODE >= KERNEL_VERSION(5,11,0)) || \
+        (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0))))
 
 #include <linux/kallsyms.h>
 #include <linux/interrupt.h>