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[S390] move (io|sysc)_restore_trace_psw into .data section

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The sysc_restore_trace_psw and io_restore_trace_psw storage locations
are created in the .text section. When creating and IPLing from a named
saved system (NSS), writing to these locations causes a protection exception
(because the .text section is mapped as shared read-only in the NSS).

To permit write access, move the storage locations into the .data section.

The problem occurs only when CONFIG_TRACE_IRQFLAGS is set.
The git commmit that has introduced these variables is:
411788ea7f

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Hendrik Brueckner
2009-09-11 10:28:42 +02:00
committed by Martin Schwidefsky
parent 18d00acfe2
commit a8c3cb4955
2 changed files with 18 additions and 2 deletions
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4
arch/s390/kernel/entry64.S
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@@ -284,10 +284,12 @@ sysc_leave:
sysc_done:
#ifdef CONFIG_TRACE_IRQFLAGS
.section .data,"aw",@progbits
.align 8
.globl sysc_restore_trace_psw
sysc_restore_trace_psw:
.quad 0, sysc_restore_trace
.previous
#endif
#
@@ -595,10 +597,12 @@ io_leave:
io_done:
#ifdef CONFIG_TRACE_IRQFLAGS
.section .data,"aw",@progbits
.align 8
.globl io_restore_trace_psw
io_restore_trace_psw:
.quad 0, io_restore_trace
.previous
#endif
#