Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=615b04b301fd4e1b7680a498b873c4ae9baad92f
Commit: 615b04b301fd4e1b7680a498b873c4ae9baad92f
Parent: 229d9c6dfb2900559449575a56dc8abcaf0bce9d
Author: Heiko Carstens <[EMAIL PROTECTED]>
AuthorDate: Wed Feb 21 10:55:37 2007 +0100
Committer: Martin Schwidefsky <[EMAIL PROTECTED]>
CommitDate: Wed Feb 21 10:55:37 2007 +0100
[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 <[EMAIL PROTECTED]>
Signed-off-by: Martin Schwidefsky <[EMAIL PROTECTED]>
---
arch/s390/kernel/head31.S | 15 ++-------------
arch/s390/kernel/head64.S | 16 ++--------------
arch/s390/kernel/ipl.c | 7 +++++++
arch/s390/kernel/setup.c | 7 ++++++-
drivers/s390/cio/cio.c | 2 +-
include/asm-s390/sections.h | 2 +-
6 files changed, 19 insertions(+), 30 deletions(-)
diff --git a/arch/s390/kernel/head31.S b/arch/s390/kernel/head31.S
index 453fd3b..da7c8bb 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 b8fec4e..af09e18 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 ee6826a..5a863a3 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 fced022..863c8d0 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
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index e4471e6..9cb129a 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -1048,7 +1048,7 @@ void reipl_ccw_dev(struct ccw_dev_id *devid)
do_reipl_asm(*((__u32*)&schid));
}
-extern struct schib ipl_schib;
+static struct schib __initdata ipl_schib;
/*
* ipl_save_parameters gets called very early. It is not allowed to access
diff --git a/include/asm-s390/sections.h b/include/asm-s390/sections.h
index 1c5a2c4..fbd9116 100644
--- a/include/asm-s390/sections.h
+++ b/include/asm-s390/sections.h
@@ -3,6 +3,6 @@
#include <asm-generic/sections.h>
-extern char _eshared[];
+extern char _eshared[], _ehead[];
#endif
-
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
