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Date: Sun, 24 May 2020 10:09:10 +0200
From: Oscar Carter <oscar.carter@....com>
To: Kees Cook <keescook@...omium.org>,
Thomas Gleixner <tglx@...utronix.de>,
Jason Cooper <jason@...edaemon.net>,
Marc Zyngier <maz@...nel.org>
Cc: kernel-hardening@...ts.openwall.com,
linux-kernel@...r.kernel.org,
Oscar Carter <oscar.carter@....com>
Subject: [PATCH] drivers/irqchip: Remove function callback casts
In an effort to enable -Wcast-function-type in the top-level Makefile to
support Control Flow Integrity builds, remove all the function callback
casts.
To do this, modify the IRQCHIP_ACPI_DECLARE macro initializing the
acpi_probe_entry struct directly instead of use the existent macro
ACPI_DECLARE_PROBE_ENTRY.
In this new initialization use the probe_subtbl field instead of the
probe_table field use in the ACPI_DECLARE_PROBE_ENTRY macro.
Signed-off-by: Oscar Carter <oscar.carter@....com>
---
include/linux/irqchip.h | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/include/linux/irqchip.h b/include/linux/irqchip.h
index 950e4b2458f0..1f464fd10df0 100644
--- a/include/linux/irqchip.h
+++ b/include/linux/irqchip.h
@@ -39,8 +39,14 @@
* @fn: initialization function
*/
#define IRQCHIP_ACPI_DECLARE(name, subtable, validate, data, fn) \
- ACPI_DECLARE_PROBE_ENTRY(irqchip, name, ACPI_SIG_MADT, \
- subtable, validate, data, fn)
+ static const struct acpi_probe_entry __acpi_probe_##name \
+ __used __section(__irqchip_acpi_probe_table) = { \
+ .id = ACPI_SIG_MADT, \
+ .type = subtable, \
+ .subtable_valid = validate, \
+ .probe_subtbl = (acpi_tbl_entry_handler)fn, \
+ .driver_data = data, \
+ }
#ifdef CONFIG_IRQCHIP
void irqchip_init(void);
--
2.20.1
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