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[S390] nss: Free unused memory in kernel image.

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With CONFIG_SHARED_KERNEL the kernel text segment that might be in a
read only memory sections starts at 1MB. Memory between 0x12000 and
0x100000 is unused then. Free this, so we have appr. an extra MB
of memory available.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens
2007-02-21 10:55:37 +01:00
committed by Martin Schwidefsky
parent 229d9c6dfb
commit 615b04b301
6 changed files with 19 additions and 30 deletions
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7
arch/s390/kernel/setup.c
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@@ -690,8 +690,13 @@ setup_memory(void)
psw_set_key(PAGE_DEFAULT_KEY);
free_bootmem_with_active_regions(0, max_pfn);
reserve_bootmem(0, PFN_PHYS(start_pfn));
/*
* Reserve memory used for lowcore/command line/kernel image.
*/
reserve_bootmem(0, (unsigned long)_ehead);
reserve_bootmem((unsigned long)_stext,
PFN_PHYS(start_pfn) - (unsigned long)_stext);
/*
* Reserve the bootmem bitmap itself as well. We do this in two
* steps (first step was init_bootmem()) because this catches