forge/linux-pinenote
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

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

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

4
arch/s390/kernel/entry64.S
View file

@ -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
#