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[S390] memory detection misses 128k.

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Fix a memory leak problem in the memory detection routines.  A memory leak
of 128k occurs when we have a contiguous memory with mixed access-mode
(read or write) ranges.

Signed-off-by: Hongjie Yang <hongjie@us.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Hongjie Yang
2007-01-09 10:18:36 +01:00
committed by Martin Schwidefsky
parent efa06708fe
commit dd401e2b92
2 changed files with 22 additions and 2 deletions
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12
arch/s390/kernel/head64.S
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@@ -172,12 +172,15 @@ startup_continue:
srl %r7,28
clr %r6,%r7 # compare cc with last access code
je .Lsame
j .Lchkmem
lghi %r8,0 # no program checks
j .Lsavchk
.Lsame:
algr %r5,%r1 # add 128KB to end of chunk
# no need to check here,
brc 12,.Lloop # this is the same chunk
.Lchkmem: # > 16EB or tprot got a program check
lghi %r8,1 # set program check flag
.Lsavchk:
clgr %r4,%r5 # chunk size > 0?
je .Lchkloop
stg %r4,0(%r3) # store start address of chunk
@@ -204,8 +207,15 @@ startup_continue:
chi %r10, 0 # do we have chunks left?
je .Ldonemem
.Lhsaskip:
chi %r8,1 # program check ?
je .Lpgmchk
lgr %r4,%r5 # potential new chunk
algr %r5,%r1 # add 128KB to end of chunk
j .Llpcnt
.Lpgmchk:
algr %r5,%r1 # add 128KB to end of chunk
lgr %r4,%r5 # potential new chunk
.Llpcnt:
clgr %r5,%r9 # should we go on?
jl .Lloop
.Ldonemem: