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| author | Alexander Gordeev <agordeev@linux.ibm.com> | 2023-07-04 08:46:26 +0300 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2023-07-04 08:46:26 +0300 |
| commit | 54372cf043276735e29045abf998895b2ac277cf (patch) | |
| tree | eed37120a84e3b2f45b89a2a51b264716ff35d16 /drivers | |
| parent | 6aca56c024e42577c28706a85979a6967b9b5e97 (diff) | |
| download | linux-54372cf043276735e29045abf998895b2ac277cf.tar.xz | |
Revert "s390/mm: get rid of VMEM_MAX_PHYS macro"
This reverts commit 456be42aa713e7f83b467db66ceae779431c7d9d.
The assumption VMEM_MAX_PHYS should match ident_map_size
is wrong. At least discontiguous saved segments (DCSS)
could be loaded at addresses beyond ident_map_size and
dcssblk device driver might fail as result.
Reported-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/char/sclp_cmd.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c index 594b34cf1c2b..3c87057436d5 100644 --- a/drivers/s390/char/sclp_cmd.c +++ b/drivers/s390/char/sclp_cmd.c @@ -392,10 +392,10 @@ static void __init add_memory_merged(u16 rn) goto skip_add; start = rn2addr(first_rn); size = (unsigned long long) num * sclp.rzm; - if (start >= ident_map_size) + if (start >= VMEM_MAX_PHYS) goto skip_add; - if (start + size > ident_map_size) - size = ident_map_size - start; + if (start + size > VMEM_MAX_PHYS) + size = VMEM_MAX_PHYS - start; if (start >= ident_map_size) goto skip_add; if (start + size > ident_map_size) |