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Commit 0de9db37 authored by Michael Holzheu's avatar Michael Holzheu Committed by Martin Schwidefsky
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s390: initialize backchain for ext_int_handler() 



To allow correct stack backtraces the backchain for the external
interrupt handler is now initialized with zero like it is already
done for example by io_int_handler().

Signed-off-by: default avatarMichael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 54310a2d

arch/s390/kernel/entry64.S

+1 −0
Original line number Original line Diff line number Diff line
@@ -622,6 +622,7 @@ ext_skip: 
	mvc	__PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC

	mvc	__PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC

	stmg	%r8,%r9,__PT_PSW(%r11)

	stmg	%r8,%r9,__PT_PSW(%r11)

	TRACE_IRQS_OFF

	TRACE_IRQS_OFF

	xc	__SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)

	lghi	%r1,4096

	lghi	%r1,4096

	lgr	%r2,%r11		# pass pointer to pt_regs

	lgr	%r2,%r11		# pass pointer to pt_regs

	llgf	%r3,__LC_EXT_CPU_ADDR	# get cpu address + interruption code

	llgf	%r3,__LC_EXT_CPU_ADDR	# get cpu address + interruption code