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authorHeiko Carstens <heiko.carstens@de.ibm.com>2007-02-21 04:55:37 -0500
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-02-21 04:55:37 -0500
commit615b04b301fd4e1b7680a498b873c4ae9baad92f (patch)
tree8f6ad0f048507858cfbdfef3f2dee5c7cffe3bbe /arch
parent229d9c6dfb2900559449575a56dc8abcaf0bce9d (diff)
[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')
-rw-r--r--arch/s390/kernel/head31.S15
-rw-r--r--arch/s390/kernel/head64.S16
-rw-r--r--arch/s390/kernel/ipl.c7
-rw-r--r--arch/s390/kernel/setup.c7
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:
148.Lstartup_init: 148.Lstartup_init:
149 .long startup_init 149 .long startup_init
150 150
151 .globl ipl_schib
152ipl_schib:
153 .rept 13
154 .long 0
155 .endr
156
157 .globl ipl_flags
158ipl_flags:
159 .long 0
160 .globl ipl_devno
161ipl_devno:
162 .word 0
163
164 .org 0x12000 151 .org 0x12000
152 .globl _ehead
153_ehead:
165#ifdef CONFIG_SHARED_KERNEL 154#ifdef CONFIG_SHARED_KERNEL
166 .org 0x100000 155 .org 0x100000
167#endif 156#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:
154.Lparmaddr: 154.Lparmaddr:
155 .quad PARMAREA 155 .quad PARMAREA
156 156
157 .globl ipl_schib
158ipl_schib:
159 .rept 13
160 .long 0
161 .endr
162
163 .globl ipl_flags
164ipl_flags:
165 .long 0
166 .globl ipl_devno
167ipl_devno:
168 .word 0
169
170 .org 0x12000 157 .org 0x12000
171 158 .globl _ehead
159_ehead:
172#ifdef CONFIG_SHARED_KERNEL 160#ifdef CONFIG_SHARED_KERNEL
173 .org 0x100000 161 .org 0x100000
174#endif 162#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 {
43#define IPL_FCP_STR "fcp" 43#define IPL_FCP_STR "fcp"
44#define IPL_NSS_STR "nss" 44#define IPL_NSS_STR "nss"
45 45
46/*
47 * Must be in data section since the bss section
48 * is not cleared when these are accessed.
49 */
50u16 ipl_devno __attribute__((__section__(".data"))) = 0;
51u32 ipl_flags __attribute__((__section__(".data"))) = 0;
52
46static char *ipl_type_str(enum ipl_type type) 53static char *ipl_type_str(enum ipl_type type)
47{ 54{
48 switch (type) { 55 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)
690 psw_set_key(PAGE_DEFAULT_KEY); 690 psw_set_key(PAGE_DEFAULT_KEY);
691 691
692 free_bootmem_with_active_regions(0, max_pfn); 692 free_bootmem_with_active_regions(0, max_pfn);
693 reserve_bootmem(0, PFN_PHYS(start_pfn));
694 693
695 /* 694 /*
695 * Reserve memory used for lowcore/command line/kernel image.
696 */
697 reserve_bootmem(0, (unsigned long)_ehead);
698 reserve_bootmem((unsigned long)_stext,
699 PFN_PHYS(start_pfn) - (unsigned long)_stext);
700 /*
696 * Reserve the bootmem bitmap itself as well. We do this in two 701 * Reserve the bootmem bitmap itself as well. We do this in two
697 * steps (first step was init_bootmem()) because this catches 702 * steps (first step was init_bootmem()) because this catches
698 * the (very unlikely) case of us accidentally initializing the 703 * the (very unlikely) case of us accidentally initializing the