21 files changed, 6 insertions, 47 deletions

diff --git a/arch/alpha/include/asm/scatterlist.h b/arch/alpha/include/asm/scatterlist.h
index 5728c52a7412..017d7471c3c4 100644
--- a/arch/alpha/include/asm/scatterlist.h
+++ b/arch/alpha/include/asm/scatterlist.h
@@ -3,6 +3,4 @@
 
 #include <asm-generic/scatterlist.h>
 
-#define ISA_DMA_THRESHOLD (~0UL)
-
 #endif /* !(_ALPHA_SCATTERLIST_H) */
diff --git a/arch/avr32/include/asm/scatterlist.h b/arch/avr32/include/asm/scatterlist.h
index 06394e5ead6c..a5902d9834e8 100644
--- a/arch/avr32/include/asm/scatterlist.h
+++ b/arch/avr32/include/asm/scatterlist.h
@@ -3,6 +3,4 @@
 
 #include <asm-generic/scatterlist.h>
 
-#define ISA_DMA_THRESHOLD (0xffffffff)
-
 #endif /* __ASM_AVR32_SCATTERLIST_H */
diff --git a/arch/blackfin/include/asm/scatterlist.h b/arch/blackfin/include/asm/scatterlist.h
index 64d41d34ab0b..d177a1588958 100644
--- a/arch/blackfin/include/asm/scatterlist.h
+++ b/arch/blackfin/include/asm/scatterlist.h
@@ -3,6 +3,4 @@
 
 #include <asm-generic/scatterlist.h>
 
-#define ISA_DMA_THRESHOLD       (0xffffffff)
-
 #endif                          /* !(_BLACKFIN_SCATTERLIST_H) */
diff --git a/arch/cris/include/asm/scatterlist.h b/arch/cris/include/asm/scatterlist.h
index 249a7842ff5f..f11f8f40ec4a 100644
--- a/arch/cris/include/asm/scatterlist.h
+++ b/arch/cris/include/asm/scatterlist.h
@@ -3,6 +3,4 @@
 
 #include <asm-generic/scatterlist.h>
 
-#define ISA_DMA_THRESHOLD (0x1fffffff)
-
 #endif /* !(__ASM_CRIS_SCATTERLIST_H) */
diff --git a/arch/frv/include/asm/scatterlist.h b/arch/frv/include/asm/scatterlist.h
index 1614bfd7e3a4..0e5eb3018468 100644
--- a/arch/frv/include/asm/scatterlist.h
+++ b/arch/frv/include/asm/scatterlist.h
@@ -3,6 +3,4 @@
 
 #include <asm-generic/scatterlist.h>
 
-#define ISA_DMA_THRESHOLD (0xffffffffUL)
-
 #endif /* !_ASM_SCATTERLIST_H */
diff --git a/arch/h8300/include/asm/scatterlist.h b/arch/h8300/include/asm/scatterlist.h
index de08a4a2cc1c..82130eda0e5f 100644
--- a/arch/h8300/include/asm/scatterlist.h
+++ b/arch/h8300/include/asm/scatterlist.h
@@ -3,6 +3,4 @@
 
 #include <asm-generic/scatterlist.h>
 
-#define ISA_DMA_THRESHOLD       (0xffffffff)
-
 #endif /* !(_H8300_SCATTERLIST_H) */
diff --git a/arch/ia64/include/asm/scatterlist.h b/arch/ia64/include/asm/scatterlist.h
index f299a4fb25c8..08fd93bff1db 100644
--- a/arch/ia64/include/asm/scatterlist.h
+++ b/arch/ia64/include/asm/scatterlist.h
@@ -2,15 +2,6 @@
 #define _ASM_IA64_SCATTERLIST_H
 
 #include <asm-generic/scatterlist.h>
-/*
- * It used to be that ISA_DMA_THRESHOLD had something to do with the
- * DMA-limits of ISA-devices.  Nowadays, its only remaining use (apart
- * from the aha1542.c driver, which isn't 64-bit clean anyhow) is to
- * tell the block-layer (via BLK_BOUNCE_ISA) what the max. physical
- * address of a page is that is allocated with GFP_DMA.  On IA-64,
- * that's 4GB - 1.
- */
-#define ISA_DMA_THRESHOLD       0xffffffff
 #define ARCH_HAS_SG_CHAIN
 
 #endif /* _ASM_IA64_SCATTERLIST_H */
diff --git a/arch/m32r/include/asm/scatterlist.h b/arch/m32r/include/asm/scatterlist.h
index aeeddd8dac17..7370b8b6243e 100644
--- a/arch/m32r/include/asm/scatterlist.h
+++ b/arch/m32r/include/asm/scatterlist.h
@@ -3,6 +3,4 @@
 
 #include <asm-generic/scatterlist.h>
 
-#define ISA_DMA_THRESHOLD (0x1fffffff)
-
 #endif /* _ASM_M32R_SCATTERLIST_H */
diff --git a/arch/m68k/include/asm/scatterlist.h b/arch/m68k/include/asm/scatterlist.h
index 175da06c6b95..312505452a1e 100644
--- a/arch/m68k/include/asm/scatterlist.h
+++ b/arch/m68k/include/asm/scatterlist.h
@@ -3,7 +3,4 @@
 
 #include <asm-generic/scatterlist.h>
 
-/* This is bogus and should go away. */
-#define ISA_DMA_THRESHOLD (0x00ffffff)
-
 #endif /* !(_M68K_SCATTERLIST_H) */
diff --git a/arch/microblaze/include/asm/scatterlist.h b/arch/microblaze/include/asm/scatterlist.h
index dc4a8900cc80..35d786fe93ae 100644
--- a/arch/microblaze/include/asm/scatterlist.h
+++ b/arch/microblaze/include/asm/scatterlist.h
@@ -1,3 +1 @@
 #include <asm-generic/scatterlist.h>
-
-#define ISA_DMA_THRESHOLD       (~0UL)
diff --git a/arch/mips/include/asm/scatterlist.h b/arch/mips/include/asm/scatterlist.h
index 9af65e79be36..7ee0e646d82c 100644
--- a/arch/mips/include/asm/scatterlist.h
+++ b/arch/mips/include/asm/scatterlist.h
@@ -3,6 +3,4 @@
 
 #include <asm-generic/scatterlist.h>
 
-#define ISA_DMA_THRESHOLD (0x00ffffffUL)
-
 #endif /* __ASM_SCATTERLIST_H */
diff --git a/arch/mn10300/include/asm/scatterlist.h b/arch/mn10300/include/asm/scatterlist.h
index 7bd00b9e030d..7baa4006008a 100644
--- a/arch/mn10300/include/asm/scatterlist.h
+++ b/arch/mn10300/include/asm/scatterlist.h
@@ -13,6 +13,4 @@
 
 #include <asm-generic/scatterlist.h>
 
-#define ISA_DMA_THRESHOLD (0x00ffffff)
-
 #endif /* _ASM_SCATTERLIST_H */
diff --git a/arch/parisc/include/asm/scatterlist.h b/arch/parisc/include/asm/scatterlist.h
index 2c3b79b54b28..8bf1f0dd1f15 100644
--- a/arch/parisc/include/asm/scatterlist.h
+++ b/arch/parisc/include/asm/scatterlist.h
@@ -5,7 +5,6 @@
 #include <asm/types.h>
 #include <asm-generic/scatterlist.h>
 
-#define ISA_DMA_THRESHOLD (~0UL)
 #define sg_virt_addr(sg) ((unsigned long)sg_virt(sg))
 
 #endif /* _ASM_PARISC_SCATTERLIST_H */
diff --git a/arch/powerpc/include/asm/scatterlist.h b/arch/powerpc/include/asm/scatterlist.h
index 34cc78fd0ef4..de1f620bd5c9 100644
--- a/arch/powerpc/include/asm/scatterlist.h
+++ b/arch/powerpc/include/asm/scatterlist.h
@@ -12,9 +12,6 @@
 #include <asm/dma.h>
 #include <asm-generic/scatterlist.h>
 
-#ifdef __powerpc64__
-#define ISA_DMA_THRESHOLD       (~0UL)
-#endif
 #define ARCH_HAS_SG_CHAIN
 
 #endif /* _ASM_POWERPC_SCATTERLIST_H */
diff --git a/arch/s390/include/asm/scatterlist.h b/arch/s390/include/asm/scatterlist.h
index be44d94cba54..35d786fe93ae 100644
--- a/arch/s390/include/asm/scatterlist.h
+++ b/arch/s390/include/asm/scatterlist.h
@@ -1,3 +1 @@
-#define ISA_DMA_THRESHOLD       (~0UL)
-
 #include <asm-generic/scatterlist.h>
diff --git a/arch/score/include/asm/scatterlist.h b/arch/score/include/asm/scatterlist.h
index 4fa1a6658215..9f533b8362c7 100644
--- a/arch/score/include/asm/scatterlist.h
+++ b/arch/score/include/asm/scatterlist.h
@@ -1,8 +1,6 @@
 #ifndef _ASM_SCORE_SCATTERLIST_H
 #define _ASM_SCORE_SCATTERLIST_H
 
-#define ISA_DMA_THRESHOLD       (~0UL)
-
 #include <asm-generic/scatterlist.h>
 
 #endif /* _ASM_SCORE_SCATTERLIST_H */
diff --git a/arch/sh/include/asm/scatterlist.h b/arch/sh/include/asm/scatterlist.h
index e38d1d4c7f6f..98dfc3510f10 100644
--- a/arch/sh/include/asm/scatterlist.h
+++ b/arch/sh/include/asm/scatterlist.h
@@ -1,8 +1,6 @@
 #ifndef __ASM_SH_SCATTERLIST_H
 #define __ASM_SH_SCATTERLIST_H
 
-#define ISA_DMA_THRESHOLD       phys_addr_mask()
-
 #include <asm-generic/scatterlist.h>
 
 #endif /* __ASM_SH_SCATTERLIST_H */
diff --git a/arch/sparc/include/asm/scatterlist.h b/arch/sparc/include/asm/scatterlist.h
index 433e45f05fd4..92bb638313f8 100644
--- a/arch/sparc/include/asm/scatterlist.h
+++ b/arch/sparc/include/asm/scatterlist.h
@@ -3,7 +3,6 @@
 
 #include <asm-generic/scatterlist.h>
 
-#define ISA_DMA_THRESHOLD       (~0UL)
 #define ARCH_HAS_SG_CHAIN
 
 #endif /* !(_SPARC_SCATTERLIST_H) */
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index da992a3ad6b7..1bcd208c459f 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -33,6 +33,7 @@
 #include "linux/mm.h"
 #include "linux/slab.h"
 #include "linux/vmalloc.h"
+#include "linux/smp_lock.h"
 #include "linux/blkpg.h"
 #include "linux/genhd.h"
 #include "linux/spinlock.h"
@@ -1098,6 +1099,7 @@ static int ubd_open(struct block_device *bdev, fmode_t mode)
         struct ubd *ubd_dev = disk->private_data;
         int err = 0;
 
+        lock_kernel();
         if(ubd_dev->count == 0){
                 err = ubd_open_dev(ubd_dev);
                 if(err){
@@ -1115,7 +1117,8 @@ static int ubd_open(struct block_device *bdev, fmode_t mode)
                 if(--ubd_dev->count == 0) ubd_close_dev(ubd_dev);
                 err = -EROFS;
         }*/
- out:
+out:
+        unlock_kernel();
         return err;
 }
 
@@ -1123,8 +1126,10 @@ static int ubd_release(struct gendisk *disk, fmode_t mode)
 {
         struct ubd *ubd_dev = disk->private_data;
 
+        lock_kernel();
         if(--ubd_dev->count == 0)
                 ubd_close_dev(ubd_dev);
+        unlock_kernel();
         return 0;
 }
 
diff --git a/arch/x86/include/asm/scatterlist.h b/arch/x86/include/asm/scatterlist.h
index fb0b1874396f..4240878b9d76 100644
--- a/arch/x86/include/asm/scatterlist.h
+++ b/arch/x86/include/asm/scatterlist.h
@@ -3,7 +3,6 @@
 
 #include <asm-generic/scatterlist.h>
 
-#define ISA_DMA_THRESHOLD (0x00ffffff)
 #define ARCH_HAS_SG_CHAIN
 
 #endif /* _ASM_X86_SCATTERLIST_H */
diff --git a/arch/xtensa/include/asm/scatterlist.h b/arch/xtensa/include/asm/scatterlist.h
index b1f9fdc1d5ba..a0421a61d9e1 100644
--- a/arch/xtensa/include/asm/scatterlist.h
+++ b/arch/xtensa/include/asm/scatterlist.h
@@ -13,6 +13,4 @@
 
 #include <asm-generic/scatterlist.h>
 
-#define ISA_DMA_THRESHOLD (~0UL)
-
 #endif  /* _XTENSA_SCATTERLIST_H */