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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-08-01 16:39:18 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-08-01 16:39:34 +0200 |
| commit | d918fe2bd72830dfbe8ca2bb30d49930d1356e6d (patch) | |
| tree | 9f5a0623c50a1505be87be15a42bb22a477d6fd7 /arch | |
| parent | 3b8e3004aea95c687e8991583e7b150ec1416ff3 (diff) | |
| download | linux-d918fe2bd72830dfbe8ca2bb30d49930d1356e6d.tar.gz linux-d918fe2bd72830dfbe8ca2bb30d49930d1356e6d.tar.bz2 linux-d918fe2bd72830dfbe8ca2bb30d49930d1356e6d.zip | |
[S390] Remove diag 0x260 call from memory detection.
The result of the diag 0x260 call is not always what one would expect.
So just remove it.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/kernel/mem_detect.c | 23 |
1 files changed, 0 insertions, 23 deletions
diff --git a/arch/s390/kernel/mem_detect.c b/arch/s390/kernel/mem_detect.c index 18ed7abe16c5..9872999c66d1 100644 --- a/arch/s390/kernel/mem_detect.c +++ b/arch/s390/kernel/mem_detect.c @@ -9,27 +9,6 @@ #include <asm/sclp.h> #include <asm/setup.h> -static int memory_fast_detect(struct mem_chunk *chunk) -{ - unsigned long val0 = 0; - unsigned long val1 = 0xc; - int rc = -EOPNOTSUPP; - - if (ipl_flags & IPL_NSS_VALID) - return -EOPNOTSUPP; - asm volatile( - " diag %1,%2,0x260\n" - "0: lhi %0,0\n" - "1:\n" - EX_TABLE(0b,1b) - : "+d" (rc), "+d" (val0), "+d" (val1) : : "cc"); - - if (rc || val0 != val1) - return -EOPNOTSUPP; - chunk->size = val0 + 1; - return 0; -} - static inline int tprot(unsigned long addr) { int rc = -EFAULT; @@ -84,8 +63,6 @@ void detect_memory_layout(struct mem_chunk chunk[]) unsigned long flags, cr0; memset(chunk, 0, MEMORY_CHUNKS * sizeof(struct mem_chunk)); - if (memory_fast_detect(&chunk[0]) == 0) - return; /* Disable IRQs, DAT and low address protection so tprot does the * right thing and we don't get scheduled away with low address * protection disabled. |