Patch "ARM: 9320/1: fix stack depot IRQ stack filter" has been added to the 5.4-stable tree

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This is a note to let you know that I've just added the patch titled

    ARM: 9320/1: fix stack depot IRQ stack filter

to the 5.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     arm-9320-1-fix-stack-depot-irq-stack-filter.patch
and it can be found in the queue-5.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit d53529335986dd371cbb1b361ae56aeb2ec2f341
Author: Vincent Whitchurch <vincent.whitchurch@xxxxxxxx>
Date:   Mon Aug 21 08:45:21 2023 +0100

    ARM: 9320/1: fix stack depot IRQ stack filter
    
    [ Upstream commit b0150014878c32197cfa66e3e2f79e57f66babc0 ]
    
    Place IRQ handlers such as gic_handle_irq() in the irqentry section even
    if FUNCTION_GRAPH_TRACER is not enabled.  Without this, the stack
    depot's filter_irq_stacks() does not correctly filter out IRQ stacks in
    those configurations, which hampers deduplication and eventually leads
    to "Stack depot reached limit capacity" splats with KASAN.
    
    A similar fix was done for arm64 in commit f6794950f0e5ba37e3bbed
    ("arm64: set __exception_irq_entry with __irq_entry as a default").
    
    Link: https://lore.kernel.org/r/20230803-arm-irqentry-v1-1-8aad8e260b1c@xxxxxxxx
    
    Signed-off-by: Vincent Whitchurch <vincent.whitchurch@xxxxxxxx>
    Signed-off-by: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/arch/arm/include/asm/exception.h b/arch/arm/include/asm/exception.h
index 58e039a851af0..3c82975d46db3 100644
--- a/arch/arm/include/asm/exception.h
+++ b/arch/arm/include/asm/exception.h
@@ -10,10 +10,6 @@
 
 #include <linux/interrupt.h>
 
-#ifdef CONFIG_FUNCTION_GRAPH_TRACER
 #define __exception_irq_entry	__irq_entry
-#else
-#define __exception_irq_entry
-#endif
 
 #endif /* __ASM_ARM_EXCEPTION_H */



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