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| author | Hongjie Yang <hongjie@us.ibm.com> | 2007-01-09 10:18:36 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-01-09 10:18:36 +0100 |
| commit | dd401e2b9250e3bb07ef388ddccbbf80aa106fc7 (patch) | |
| tree | 3043c1d699d3d5f31bf6a47985fdf24760a38990 /arch | |
| parent | Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jmorr... (diff) | |
| download | linux-dd401e2b9250e3bb07ef388ddccbbf80aa106fc7.tar.xz linux-dd401e2b9250e3bb07ef388ddccbbf80aa106fc7.zip | |
[S390] memory detection misses 128k.
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/kernel/head31.S | 12 | ||||
| -rw-r--r-- | arch/s390/kernel/head64.S | 12 |
2 files changed, 22 insertions, 2 deletions
diff --git a/arch/s390/kernel/head31.S b/arch/s390/kernel/head31.S index 4388b3309e0c..eca507050e47 100644 --- a/arch/s390/kernel/head31.S +++ b/arch/s390/kernel/head31.S @@ -164,11 +164,14 @@ startup_continue: srl %r7,28 clr %r6,%r7 # compare cc with last access code be .Lsame-.LPG1(%r13) - b .Lchkmem-.LPG1(%r13) + lhi %r8,0 # no program checks + b .Lsavchk-.LPG1(%r13) .Lsame: ar %r5,%r1 # add 128KB to end of chunk bno .Lloop-.LPG1(%r13) # r1 < 0x80000000 -> loop .Lchkmem: # > 2GB or tprot got a program check + lhi %r8,1 # set program check flag +.Lsavchk: clr %r4,%r5 # chunk size > 0? be .Lchkloop-.LPG1(%r13) st %r4,0(%r3) # store start address of chunk @@ -190,8 +193,15 @@ startup_continue: je .Ldonemem # if not, leave chi %r10,0 # do we have chunks left? je .Ldonemem + chi %r8,1 # program check ? + je .Lpgmchk + lr %r4,%r5 # potential new chunk + alr %r5,%r1 # add 128KB to end of chunk + j .Llpcnt +.Lpgmchk: alr %r5,%r1 # add 128KB to end of chunk lr %r4,%r5 # potential new chunk +.Llpcnt: clr %r5,%r9 # should we go on? jl .Lloop .Ldonemem: diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S index c526279e1123..6ba3f4512dd1 100644 --- a/arch/s390/kernel/head64.S +++ b/arch/s390/kernel/head64.S @@ -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: |