tree e0da49adffc89b068645ef2c577fbebe093faf8c
parent 8154c5d22d91cd16bd9985b0638c8957e4688d0e
author Paul Mackerras <paulus@samba.org> 1281644328 +0000
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1283400451 +1000

powerpc: Dynamically allocate most lppaca structs

This arranges for the lppaca structs for most cpus to be dynamically
allocated in the same manner as the paca structs.  If we don't include
support for legacy iSeries, only the first lppaca is statically
allocated; the rest are dynamically allocated.  If we include legacy
iSeries support, then we statically allocate the first 64 lppaca
structs, since the iSeries hypervisor requires that the lppaca
structs be present in the data section of the kernel image, but
legacy iSeries supports at most 64 cpus.

With CONFIG_NR_CPUS, the kernel image size for a typical pSeries config
went from:

   text    data     bss     dec     hex filename
9524478 4734564 8469944 22728986        15ad11a ../test-1024/vmlinux

to:

   text    data     bss     dec     hex filename
9524482 3751508 8469944 21745934        14bd10e ../test-1024/vmlinux

a reduction of 983052 bytes overall.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>