s390/mm: let kernel text section always begin at 1MB

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

Let the kernel text section always begin at 1MB. This allows to always have
a large frame in the identity mapping of the kernel image for beginning of
the text section, if the machine has EDAT1 support.
Moving the beginning from 64K to 1MB doesn't cost any memory, since we make
the memory between 64K and 1MB available for the page allocator.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

authored by

Heiko Carstens and committed by

Martin Schwidefsky 13 years ago 9be5f34f 8fe234d3

-6

2 changed files

expand all

arch

s390

kernel

head31.S

head64.S

-3

arch/s390/kernel/head31.S

··· 78 78 79 79 ENTRY(_ehead) 80 80 81 - #ifdef CONFIG_SHARED_KERNEL 82 81 .org 0x100000 - 0x11000 # head.o ends at 0x11000 83 - #endif 84 - 85 82 # 86 83 # startup-code, running in absolute addressing mode 87 84 #

-3

arch/s390/kernel/head64.S

··· 76 76 77 77 ENTRY(_ehead) 78 78 79 - #ifdef CONFIG_SHARED_KERNEL 80 79 .org 0x100000 - 0x11000 # head.o ends at 0x11000 81 - #endif 82 - 83 80 # 84 81 # startup-code, running in absolute addressing mode 85 82 #