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authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-01 08:26:44 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-01 08:26:44 -0800
commit0d9ccfe1b5321b8d27117817b9ae4d3288c8b015 (patch)
tree0fb1cd938d72785e7df7a29a2025771c7784e496
parentf13a48bd798a159291ca583b95453171b88b7448 (diff)
parentf133f22dd6f413bdf71ebf7e00ce441d98ac7c87 (diff)
Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: MIPS: Loongson: Switch from flatmem to sparsemem MIPS: Loongson: Disallow 4kB pages MIPS: Add missing definition for MADV_HWPOISON. MIPS: Fix build error if __xchg() is not getting inlined. MIPS: IP22/IP28 Disable early printk to fix boot problems on some systems.
-rw-r--r--arch/mips/Kconfig21
-rw-r--r--arch/mips/include/asm/mman.h1
-rw-r--r--arch/mips/include/asm/system.h15
3 files changed, 28 insertions, 9 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 1aad0d9f507..fd7620f025f 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -358,7 +358,14 @@ config SGI_IP22
select SWAP_IO_SPACE
select SYS_HAS_CPU_R4X00
select SYS_HAS_CPU_R5000
- select SYS_HAS_EARLY_PRINTK
+ #
+ # Disable EARLY_PRINTK for now since it leads to overwritten prom
+ # memory during early boot on some machines.
+ #
+ # See http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20091119164009.GA15038%40deprecation.cyrius.com
+ # for a more details discussion
+ #
+ # select SYS_HAS_EARLY_PRINTK
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
@@ -410,7 +417,14 @@ config SGI_IP28
select SGI_HAS_ZILOG
select SWAP_IO_SPACE
select SYS_HAS_CPU_R10000
- select SYS_HAS_EARLY_PRINTK
+ #
+ # Disable EARLY_PRINTK for now since it leads to overwritten prom
+ # memory during early boot on some machines.
+ #
+ # See http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20091119164009.GA15038%40deprecation.cyrius.com
+ # for a more details discussion
+ #
+ # select SYS_HAS_EARLY_PRINTK
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
help
@@ -1439,6 +1453,7 @@ choice
config PAGE_SIZE_4KB
bool "4kB"
+ depends on !CPU_LOONGSON2
help
This option select the standard 4kB Linux page size. On some
R3000-family processors this is the only available page size. Using
@@ -1763,7 +1778,7 @@ config SYS_SUPPORTS_SMARTMIPS
config ARCH_FLATMEM_ENABLE
def_bool y
- depends on !NUMA
+ depends on !NUMA && !CPU_LOONGSON2
config ARCH_DISCONTIGMEM_ENABLE
bool
diff --git a/arch/mips/include/asm/mman.h b/arch/mips/include/asm/mman.h
index a2250f390a2..c892bfb3e2c 100644
--- a/arch/mips/include/asm/mman.h
+++ b/arch/mips/include/asm/mman.h
@@ -75,6 +75,7 @@
#define MADV_MERGEABLE 12 /* KSM may merge identical pages */
#define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */
+#define MADV_HWPOISON 100 /* poison a page for testing */
/* compatibility flags */
#define MAP_FILE 0
diff --git a/arch/mips/include/asm/system.h b/arch/mips/include/asm/system.h
index fcf5f98d90c..83b5509e09e 100644
--- a/arch/mips/include/asm/system.h
+++ b/arch/mips/include/asm/system.h
@@ -12,6 +12,7 @@
#ifndef _ASM_SYSTEM_H
#define _ASM_SYSTEM_H
+#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/irqflags.h>
@@ -193,10 +194,6 @@ extern __u64 __xchg_u64_unsupported_on_32bit_kernels(volatile __u64 * m, __u64 v
#define __xchg_u64 __xchg_u64_unsupported_on_32bit_kernels
#endif
-/* This function doesn't exist, so you'll get a linker error
- if something tries to do an invalid xchg(). */
-extern void __xchg_called_with_bad_pointer(void);
-
static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
{
switch (size) {
@@ -205,11 +202,17 @@ static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int siz
case 8:
return __xchg_u64(ptr, x);
}
- __xchg_called_with_bad_pointer();
+
return x;
}
-#define xchg(ptr, x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
+#define xchg(ptr, x) \
+({ \
+ BUILD_BUG_ON(sizeof(*(ptr)) & ~0xc); \
+ \
+ ((__typeof__(*(ptr))) \
+ __xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))); \
+})
extern void set_handler(unsigned long offset, void *addr, unsigned long len);
extern void set_uncached_handler(unsigned long offset, void *addr, unsigned long len);