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Subject[tip:x86/irq] x86: Remove CONFIG_4KSTACKS
Commit-ID:  dcfa726280116dd31adad37da940f542663567d0
Gitweb: http://git.kernel.org/tip/dcfa726280116dd31adad37da940f542663567d0
Author: Christoph Hellwig <hch@lst.de>
AuthorDate: Mon, 28 Jun 2010 14:16:14 +0200
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Tue, 29 Jun 2010 12:12:59 +0200

x86: Remove CONFIG_4KSTACKS

These days 4 kilobytes of stack just aren't enough for reliably operation,
and people using lots of threads have long switched to 64-bit kernels, so
remove the CONFIG_4KSTACKS option.

Signed-off-by: Christoph Hellwig <hch@lst.de>
LKML-Reference: <20100628121614.GB6605@lst.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
arch/x86/Kconfig.debug | 9 ---------
arch/x86/include/asm/module.h | 7 +------
arch/x86/include/asm/page_32_types.h | 4 ----
3 files changed, 1 insertions(+), 19 deletions(-)

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index badda8e..7f15308 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -121,15 +121,6 @@ config DEBUG_NX_TEST
and the software setup of this feature.
If in doubt, say "N"

-config 4KSTACKS
- bool "Use 4Kb for kernel stacks instead of 8Kb"
- depends on X86_32
- ---help---
- If you say Y here the kernel will use a 4Kb stacksize for the
- kernel stack attached to each process/thread. This facilitates
- running more threads on a system and also reduces the pressure
- on the VM subsystem for higher order allocations.
-
config DOUBLEFAULT
default y
bool "Enable doublefault exception handler" if EMBEDDED
diff --git a/arch/x86/include/asm/module.h b/arch/x86/include/asm/module.h
index 3e2ce58..67763c5 100644
--- a/arch/x86/include/asm/module.h
+++ b/arch/x86/include/asm/module.h
@@ -60,12 +60,7 @@
#endif

#ifdef CONFIG_X86_32
-# ifdef CONFIG_4KSTACKS
-# define MODULE_STACKSIZE "4KSTACKS "
-# else
-# define MODULE_STACKSIZE ""
-# endif
-# define MODULE_ARCH_VERMAGIC MODULE_PROC_FAMILY MODULE_STACKSIZE
+# define MODULE_ARCH_VERMAGIC MODULE_PROC_FAMILY
#endif

#endif /* _ASM_X86_MODULE_H */
diff --git a/arch/x86/include/asm/page_32_types.h b/arch/x86/include/asm/page_32_types.h
index 6f1b733..ade619f 100644
--- a/arch/x86/include/asm/page_32_types.h
+++ b/arch/x86/include/asm/page_32_types.h
@@ -15,11 +15,7 @@
*/
#define __PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)

-#ifdef CONFIG_4KSTACKS
-#define THREAD_ORDER 0
-#else
#define THREAD_ORDER 1
-#endif
#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)

#define STACKFAULT_STACK 0

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