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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2007-03-19 13:18:50 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-03-19 13:18:50 +0100 |
| commit | 257c6e1ce8f875dd02220e90cf38e615e47788fe (patch) | |
| tree | 2fa6710a381d323202bbbce2971dd4743d239075 /arch/s390 | |
| parent | dcc49d460c4052d2fa7ba44e81d3b814b799f802 (diff) | |
| download | linux-257c6e1ce8f875dd02220e90cf38e615e47788fe.tar.bz2 | |
[S390] memory detection: fix off by one bug.
diag 260 returns the address of the last addressable byte and not the
size of memory. Since we want the size we have to add 1 to the return
value.
Disable diag 260 for non z/Arch mode since it doesn't work there
anyway.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kernel/early.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index afca1c6f4d21..5e47936573f2 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -141,9 +141,9 @@ static noinline __init void detect_machine_type(void) machine_flags |= 4; } +#ifdef CONFIG_64BIT static noinline __init int memory_fast_detect(void) { - unsigned long val0 = 0; unsigned long val1 = 0xc; int ret = -ENOSYS; @@ -161,9 +161,15 @@ static noinline __init int memory_fast_detect(void) if (ret || val0 != val1) return -ENOSYS; - memory_chunk[0].size = val0; + memory_chunk[0].size = val0 + 1; return 0; } +#else +static inline int memory_fast_detect(void) +{ + return -ENOSYS; +} +#endif #define ADDR2G (1UL << 31) |