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| author | Hendrik Brueckner <brueckner@linux.vnet.ibm.com> | 2009-09-11 10:28:42 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-09-11 10:29:47 +0200 |
| commit | a8c3cb4955d1a051732ead9ecf8bcffc8e7c039d (patch) | |
| tree | 434c789a7b4e3484ef077f1185d09924ee93d3c6 /arch/s390/kernel/entry64.S | |
| parent | 18d00acfe2f3fc5ee62f679eb2e397ae962fe69b (diff) | |
| download | talos-obmc-linux-a8c3cb4955d1a051732ead9ecf8bcffc8e7c039d.tar.gz talos-obmc-linux-a8c3cb4955d1a051732ead9ecf8bcffc8e7c039d.zip | |
[S390] move (io|sysc)_restore_trace_psw into .data section
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:
411788ea7fca01ee803af8225ac35807b4d02050
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/entry64.S')
| -rw-r--r-- | arch/s390/kernel/entry64.S | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S index f6618e9e15ef..009ca6175db9 100644 --- a/arch/s390/kernel/entry64.S +++ b/arch/s390/kernel/entry64.S @@ -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 # |
