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authorHeiko Carstens <heiko.carstens@de.ibm.com>2016-12-06 17:52:10 +0300
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2016-12-12 14:11:20 +0300
commitd543a106f96d6f15e4507cf349128912d44356d9 (patch)
treefa6fee4676c09b7a36a190e1c4121b9041f0b9b9 /arch/s390/include/asm/ipl.h
parentb5cb9bf8dd2ce94a2de507bc7546d965cbd421a6 (diff)
downloadlinux-d543a106f96d6f15e4507cf349128912d44356d9.tar.xz
s390: fix initrd corruptions with gcov/kcov instrumented kernels
The early C code within arch/s390/kernel/early.c saves ipl parameters before the bss section is cleared. When doing that it jumps to code that is potentially gcov/kcov instrumented. That code in turn will corrupt an initrd that potentially may reside in the not yet ready to be used bss section. Instead of excluding more and more code from gcov/kcov instrumentation provide an early memmove function which will be used to save ipl parameters. The verification if these parameters are actually valid will be done later. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/ipl.h')
-rw-r--r--arch/s390/include/asm/ipl.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/include/asm/ipl.h b/arch/s390/include/asm/ipl.h
index 4da22b2f0521..edb5161df7e2 100644
--- a/arch/s390/include/asm/ipl.h
+++ b/arch/s390/include/asm/ipl.h
@@ -97,7 +97,7 @@ void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
extern void do_reipl(void);
extern void do_halt(void);
extern void do_poff(void);
-extern void ipl_save_parameters(void);
+extern void ipl_verify_parameters(void);
extern void ipl_update_parameters(void);
extern size_t append_ipl_vmparm(char *, size_t);
extern size_t append_ipl_scpdata(char *, size_t);