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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2007-02-21 12:55:37 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-02-21 12:55:37 +0300 |
| commit | 615b04b301fd4e1b7680a498b873c4ae9baad92f (patch) | |
| tree | 8f6ad0f048507858cfbdfef3f2dee5c7cffe3bbe /arch/s390 | |
| parent | 229d9c6dfb2900559449575a56dc8abcaf0bce9d (diff) | |
| download | linux-615b04b301fd4e1b7680a498b873c4ae9baad92f.tar.xz | |
[S390] nss: Free unused memory in kernel image.
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>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kernel/head31.S | 15 | ||||
| -rw-r--r-- | arch/s390/kernel/head64.S | 16 | ||||
| -rw-r--r-- | arch/s390/kernel/ipl.c | 7 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 7 |
4 files changed, 17 insertions, 28 deletions
diff --git a/arch/s390/kernel/head31.S b/arch/s390/kernel/head31.S index 453fd3b4edea..da7c8bb80982 100644 --- a/arch/s390/kernel/head31.S +++ b/arch/s390/kernel/head31.S @@ -148,20 +148,9 @@ startup_continue: .Lstartup_init: .long startup_init - .globl ipl_schib -ipl_schib: - .rept 13 - .long 0 - .endr - - .globl ipl_flags -ipl_flags: - .long 0 - .globl ipl_devno -ipl_devno: - .word 0 - .org 0x12000 + .globl _ehead +_ehead: #ifdef CONFIG_SHARED_KERNEL .org 0x100000 #endif diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S index b8fec4e5c5d4..af09e18cc5d0 100644 --- a/arch/s390/kernel/head64.S +++ b/arch/s390/kernel/head64.S @@ -154,21 +154,9 @@ startup_continue: .Lparmaddr: .quad PARMAREA - .globl ipl_schib -ipl_schib: - .rept 13 - .long 0 - .endr - - .globl ipl_flags -ipl_flags: - .long 0 - .globl ipl_devno -ipl_devno: - .word 0 - .org 0x12000 - + .globl _ehead +_ehead: #ifdef CONFIG_SHARED_KERNEL .org 0x100000 #endif diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c index ee6826a52d26..5a863a3bf10c 100644 --- a/arch/s390/kernel/ipl.c +++ b/arch/s390/kernel/ipl.c @@ -43,6 +43,13 @@ enum ipl_type { #define IPL_FCP_STR "fcp" #define IPL_NSS_STR "nss" +/* + * Must be in data section since the bss section + * is not cleared when these are accessed. + */ +u16 ipl_devno __attribute__((__section__(".data"))) = 0; +u32 ipl_flags __attribute__((__section__(".data"))) = 0; + static char *ipl_type_str(enum ipl_type type) { switch (type) { diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index fced022dc58d..863c8d08c026 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -690,9 +690,14 @@ 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 * the (very unlikely) case of us accidentally initializing the |