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authorHeiko Carstens <heiko.carstens@de.ibm.com>2009-07-24 06:39:49 -0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-07-24 06:41:00 -0400
commit5f954c3426190f7ae432a09abd62164d5d14c709 (patch)
treec1e9fdd5f374f01c45da82ec5d972626b7c7bd80 /arch/s390/kernel/early.c
parent4be3bd7849165e7efa6b0b35a23d6a3598d97465 (diff)
[S390] hibernation: fix lowcore handling
Our swsusp_arch_suspend() backend implementation disables prefixing by setting the contents of the prefix register to 0. However afterwards common code functions are called which might access percpu data structures. Since the lowcore contains e.g. the percpu base pointer this isn't a good idea. So fix this by copying the hibernating cpu's lowcore to absolute address zero. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/early.c')
-rw-r--r--arch/s390/kernel/early.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index f9b144049dc9..8d15314381e0 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -210,7 +210,7 @@ static noinline __init void detect_machine_type(void)
210 machine_flags |= MACHINE_FLAG_VM; 210 machine_flags |= MACHINE_FLAG_VM;
211} 211}
212 212
213static void early_pgm_check_handler(void) 213static __init void early_pgm_check_handler(void)
214{ 214{
215 unsigned long addr; 215 unsigned long addr;
216 const struct exception_table_entry *fixup; 216 const struct exception_table_entry *fixup;
@@ -222,7 +222,7 @@ static void early_pgm_check_handler(void)
222 S390_lowcore.program_old_psw.addr = fixup->fixup | PSW_ADDR_AMODE; 222 S390_lowcore.program_old_psw.addr = fixup->fixup | PSW_ADDR_AMODE;
223} 223}
224 224
225void setup_lowcore_early(void) 225static noinline __init void setup_lowcore_early(void)
226{ 226{
227 psw_t psw; 227 psw_t psw;
228 228