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[S390] fix boot failures with compressed kernels

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Fix two bugs with the kernel image compression:
1) reset the bss section of the compressed vmlinux
2) clear the high half of the registers for 64 bit early enough
   for the decompression step

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2010-03-24 11:49:57 +01:00
committed by Martin Schwidefsky
parent 7b26d82f5e
commit 06c0dd72ae
3 changed files with 7 additions and 6 deletions
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3
arch/s390/kernel/head.S
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@@ -517,7 +517,10 @@ startup:
lhi %r1,2 # mode 2 = esame (dump)
sigp %r1,%r0,0x12 # switch to esame mode
sam64 # switch to 64 bit mode
larl %r13,4f
lmh %r0,%r15,0(%r13) # clear high-order half
jg startup_continue
4: .fill 16,4,0x0
#else
mvi __LC_AR_MODE_ID,0 # set ESA flag (mode 0)
l %r13,4f-.LPG0(%r13)