Update the i.MX31 Kernel to 2.6.232.6.23-mx31ads-2008022618072.6.23-mx31-200802261807

This is the result of a brute-force attempt to update the kernel to 2.6.23.
Now that we have a git tree, our effort will be a little nicer in the future.

Signed-off-by: Justin Waters <justin.waters@timesys.com>

9 files changed, 160 insertions, 121 deletions

diff --git a/include/asm-generic/bitops/sched.h b/include/asm-generic/bitops/sched.h
index 815bb0148060..604fab7031a6 100644
--- a/include/asm-generic/bitops/sched.h
+++ b/include/asm-generic/bitops/sched.h
@@ -6,28 +6,23 @@
 
 /*
  * Every architecture must define this function. It's the fastest
- * way of searching a 140-bit bitmap where the first 100 bits are
- * unlikely to be set. It's guaranteed that at least one of the 140
- * bits is cleared.
+ * way of searching a 100-bit bitmap.  It's guaranteed that at least
+ * one of the 100 bits is cleared.
  */
 static inline int sched_find_first_bit(const unsigned long *b)
 {
 #if BITS_PER_LONG == 64
-	if (unlikely(b[0]))
+	if (b[0])
 		return __ffs(b[0]);
-	if (likely(b[1]))
-		return __ffs(b[1]) + 64;
-	return __ffs(b[2]) + 128;
+	return __ffs(b[1]) + 64;
 #elif BITS_PER_LONG == 32
-	if (unlikely(b[0]))
+	if (b[0])
 		return __ffs(b[0]);
-	if (unlikely(b[1]))
+	if (b[1])
 		return __ffs(b[1]) + 32;
-	if (unlikely(b[2]))
+	if (b[2])
 		return __ffs(b[2]) + 64;
-	if (b[3])
-		return __ffs(b[3]) + 96;
-	return __ffs(b[4]) + 128;
+	return __ffs(b[3]) + 96;
 #else
 #error BITS_PER_LONG not defined
 #endif
diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index 7f30cce52857..d56fedbb457a 100644
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -28,12 +28,12 @@ struct bug_entry {
 #endif
 
 #ifndef HAVE_ARCH_BUG_ON
-#define BUG_ON(condition) do { if (unlikely((condition)!=0)) BUG(); } while(0)
+#define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while(0)
 #endif
 
 #ifndef HAVE_ARCH_WARN_ON
 #define WARN_ON(condition) ({						\
-	typeof(condition) __ret_warn_on = (condition);			\
+	int __ret_warn_on = !!(condition);				\
 	if (unlikely(__ret_warn_on)) {					\
 		printk("WARNING: at %s:%d %s()\n", __FILE__,		\
 			__LINE__, __FUNCTION__);			\
@@ -54,7 +54,7 @@ struct bug_entry {
 
 #ifndef HAVE_ARCH_WARN_ON
 #define WARN_ON(condition) ({						\
-	typeof(condition) __ret_warn_on = (condition);			\
+	int __ret_warn_on = !!(condition);				\
 	unlikely(__ret_warn_on);					\
 })
 #endif
@@ -62,7 +62,7 @@ struct bug_entry {
 
 #define WARN_ON_ONCE(condition)	({				\
 	static int __warned;					\
-	typeof(condition) __ret_warn_once = (condition);	\
+	int __ret_warn_once = !!(condition);			\
 								\
 	if (unlikely(__ret_warn_once))				\
 		if (WARN_ON(!__warned)) 			\
diff --git a/include/asm-generic/dma-mapping-broken.h b/include/asm-generic/dma-mapping-broken.h
index 29413d3d4605..e2468f894d2a 100644
--- a/include/asm-generic/dma-mapping-broken.h
+++ b/include/asm-generic/dma-mapping-broken.h
@@ -1,24 +1,82 @@
 #ifndef _ASM_GENERIC_DMA_MAPPING_H
 #define _ASM_GENERIC_DMA_MAPPING_H
 
-/* This is used for archs that do not support DMA */
+/* define the dma api to allow compilation but not linking of
+ * dma dependent code.  Code that depends on the dma-mapping
+ * API needs to set 'depends on HAS_DMA' in its Kconfig
+ */
 
-static inline void *
+struct scatterlist;
+
+extern void *
 dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
-		   gfp_t flag)
-{
-	BUG();
-	return NULL;
-}
+		   gfp_t flag);
 
-static inline void
+extern void
 dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
-		    dma_addr_t dma_handle)
-{
-	BUG();
-}
+		    dma_addr_t dma_handle);
 
 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 
+extern dma_addr_t
+dma_map_single(struct device *dev, void *ptr, size_t size,
+	       enum dma_data_direction direction);
+
+extern void
+dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
+		 enum dma_data_direction direction);
+
+extern int
+dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+	   enum dma_data_direction direction);
+
+extern void
+dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
+	     enum dma_data_direction direction);
+
+extern dma_addr_t
+dma_map_page(struct device *dev, struct page *page, unsigned long offset,
+	     size_t size, enum dma_data_direction direction);
+
+extern void
+dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
+	       enum dma_data_direction direction);
+
+extern void
+dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
+			enum dma_data_direction direction);
+
+extern void
+dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
+			      unsigned long offset, size_t size,
+			      enum dma_data_direction direction);
+
+extern void
+dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
+		    enum dma_data_direction direction);
+
+#define dma_sync_single_for_device dma_sync_single_for_cpu
+#define dma_sync_single_range_for_device dma_sync_single_range_for_cpu
+#define dma_sync_sg_for_device dma_sync_sg_for_cpu
+
+extern int
+dma_mapping_error(dma_addr_t dma_addr);
+
+extern int
+dma_supported(struct device *dev, u64 mask);
+
+extern int
+dma_set_mask(struct device *dev, u64 mask);
+
+extern int
+dma_get_cache_alignment(void);
+
+extern int
+dma_is_consistent(struct device *dev, dma_addr_t dma_handle);
+
+extern void
+dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+	       enum dma_data_direction direction);
+
 #endif /* _ASM_GENERIC_DMA_MAPPING_H */
diff --git a/include/asm-generic/fcntl.h b/include/asm-generic/fcntl.h
index c154b9d6e7e5..b8477414c5c8 100644
--- a/include/asm-generic/fcntl.h
+++ b/include/asm-generic/fcntl.h
@@ -48,6 +48,9 @@
 #ifndef O_NOATIME
 #define O_NOATIME	01000000
 #endif
+#ifndef O_CLOEXEC
+#define O_CLOEXEC	02000000	/* set close_on_exec */
+#endif
 #ifndef O_NDELAY
 #define O_NDELAY	O_NONBLOCK
 #endif
diff --git a/include/asm-generic/percpu.h b/include/asm-generic/percpu.h
index d984a9041436..d85172e9ed45 100644
--- a/include/asm-generic/percpu.h
+++ b/include/asm-generic/percpu.h
@@ -14,6 +14,11 @@ extern unsigned long __per_cpu_offset[NR_CPUS];
 #define DEFINE_PER_CPU(type, name) \
     __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
 
+#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name)		\
+    __attribute__((__section__(".data.percpu.shared_aligned"))) \
+    __typeof__(type) per_cpu__##name				\
+    ____cacheline_aligned_in_smp
+
 /* var is in discarded region: offset to particular copy we want */
 #define per_cpu(var, cpu) (*({				\
 	extern int simple_identifier_##var(void);	\
@@ -34,6 +39,9 @@ do {								\
 #define DEFINE_PER_CPU(type, name) \
     __typeof__(type) per_cpu__##name
 
+#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name)	\
+    DEFINE_PER_CPU(type, name)
+
 #define per_cpu(var, cpu)			(*((void)(cpu), &per_cpu__##var))
 #define __get_cpu_var(var)			per_cpu__##var
 #define __raw_get_cpu_var(var)			per_cpu__##var
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 7d7bcf990e99..5f0d797d33fd 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -2,25 +2,7 @@
 #define _ASM_GENERIC_PGTABLE_H
 
 #ifndef __ASSEMBLY__
-
-#ifndef __HAVE_ARCH_PTEP_ESTABLISH
-/*
- * Establish a new mapping:
- *  - flush the old one
- *  - update the page tables
- *  - inform the TLB about the new one
- *
- * We hold the mm semaphore for reading, and the pte lock.
- *
- * Note: the old pte is known to not be writable, so we don't need to
- * worry about dirty bits etc getting lost.
- */
-#define ptep_establish(__vma, __address, __ptep, __entry)		\
-do {				  					\
-	set_pte_at((__vma)->vm_mm, (__address), __ptep, __entry);	\
-	flush_tlb_page(__vma, __address);				\
-} while (0)
-#endif
+#ifdef CONFIG_MMU
 
 #ifndef __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
 /*
@@ -68,31 +50,6 @@ do {				  					\
 })
 #endif
 
-#ifndef __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
-#define ptep_test_and_clear_dirty(__vma, __address, __ptep)		\
-({									\
-	pte_t __pte = *__ptep;						\
-	int r = 1;							\
-	if (!pte_dirty(__pte))						\
-		r = 0;							\
-	else								\
-		set_pte_at((__vma)->vm_mm, (__address), (__ptep),	\
-			   pte_mkclean(__pte));				\
-	r;								\
-})
-#endif
-
-#ifndef __HAVE_ARCH_PTEP_CLEAR_DIRTY_FLUSH
-#define ptep_clear_flush_dirty(__vma, __address, __ptep)		\
-({									\
-	int __dirty;							\
-	__dirty = ptep_test_and_clear_dirty(__vma, __address, __ptep);	\
-	if (__dirty)							\
-		flush_tlb_page(__vma, __address);			\
-	__dirty;							\
-})
-#endif
-
 #ifndef __HAVE_ARCH_PTEP_GET_AND_CLEAR
 #define ptep_get_and_clear(__mm, __address, __ptep)			\
 ({									\
@@ -177,41 +134,6 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addres
 #endif
 
 /*
- * A facility to provide lazy MMU batching.  This allows PTE updates and
- * page invalidations to be delayed until a call to leave lazy MMU mode
- * is issued.  Some architectures may benefit from doing this, and it is
- * beneficial for both shadow and direct mode hypervisors, which may batch
- * the PTE updates which happen during this window.  Note that using this
- * interface requires that read hazards be removed from the code.  A read
- * hazard could result in the direct mode hypervisor case, since the actual
- * write to the page tables may not yet have taken place, so reads though
- * a raw PTE pointer after it has been modified are not guaranteed to be
- * up to date.  This mode can only be entered and left under the protection of
- * the page table locks for all page tables which may be modified.  In the UP
- * case, this is required so that preemption is disabled, and in the SMP case,
- * it must synchronize the delayed page table writes properly on other CPUs.
- */
-#ifndef __HAVE_ARCH_ENTER_LAZY_MMU_MODE
-#define arch_enter_lazy_mmu_mode()	do {} while (0)
-#define arch_leave_lazy_mmu_mode()	do {} while (0)
-#define arch_flush_lazy_mmu_mode()	do {} while (0)
-#endif
-
-/*
- * A facility to provide batching of the reload of page tables with the
- * actual context switch code for paravirtualized guests.  By convention,
- * only one of the lazy modes (CPU, MMU) should be active at any given
- * time, entry should never be nested, and entry and exits should always
- * be paired.  This is for sanity of maintaining and reasoning about the
- * kernel code.
- */
-#ifndef __HAVE_ARCH_ENTER_LAZY_CPU_MODE
-#define arch_enter_lazy_cpu_mode()	do {} while (0)
-#define arch_leave_lazy_cpu_mode()	do {} while (0)
-#define arch_flush_lazy_cpu_mode()	do {} while (0)
-#endif
-
-/*
  * When walking page tables, get the address of the next boundary,
  * or the end address of the range if that comes earlier.  Although no
  * vma end wraps to 0, rounded up __boundary may wrap to 0 throughout.
@@ -277,6 +199,43 @@ static inline int pmd_none_or_clear_bad(pmd_t *pmd)
 	}
 	return 0;
 }
+#endif /* CONFIG_MMU */
+
+/*
+ * A facility to provide lazy MMU batching.  This allows PTE updates and
+ * page invalidations to be delayed until a call to leave lazy MMU mode
+ * is issued.  Some architectures may benefit from doing this, and it is
+ * beneficial for both shadow and direct mode hypervisors, which may batch
+ * the PTE updates which happen during this window.  Note that using this
+ * interface requires that read hazards be removed from the code.  A read
+ * hazard could result in the direct mode hypervisor case, since the actual
+ * write to the page tables may not yet have taken place, so reads though
+ * a raw PTE pointer after it has been modified are not guaranteed to be
+ * up to date.  This mode can only be entered and left under the protection of
+ * the page table locks for all page tables which may be modified.  In the UP
+ * case, this is required so that preemption is disabled, and in the SMP case,
+ * it must synchronize the delayed page table writes properly on other CPUs.
+ */
+#ifndef __HAVE_ARCH_ENTER_LAZY_MMU_MODE
+#define arch_enter_lazy_mmu_mode()	do {} while (0)
+#define arch_leave_lazy_mmu_mode()	do {} while (0)
+#define arch_flush_lazy_mmu_mode()	do {} while (0)
+#endif
+
+/*
+ * A facility to provide batching of the reload of page tables with the
+ * actual context switch code for paravirtualized guests.  By convention,
+ * only one of the lazy modes (CPU, MMU) should be active at any given
+ * time, entry should never be nested, and entry and exits should always
+ * be paired.  This is for sanity of maintaining and reasoning about the
+ * kernel code.
+ */
+#ifndef __HAVE_ARCH_ENTER_LAZY_CPU_MODE
+#define arch_enter_lazy_cpu_mode()	do {} while (0)
+#define arch_leave_lazy_cpu_mode()	do {} while (0)
+#define arch_flush_lazy_cpu_mode()	do {} while (0)
+#endif
+
 #endif /* !__ASSEMBLY__ */
 
 #endif /* _ASM_GENERIC_PGTABLE_H */
diff --git a/include/asm-generic/termios.h b/include/asm-generic/termios.h
index 3769e6bd63b1..33dca30a3c45 100644
--- a/include/asm-generic/termios.h
+++ b/include/asm-generic/termios.h
@@ -63,6 +63,8 @@ static inline int kernel_termios_to_user_termio(struct termio __user *termio,
 
 #define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
 #define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
+#define user_termios_to_kernel_termios_1(k, u) copy_from_user(k, u, sizeof(struct termios))
+#define kernel_termios_to_user_termios_1(u, k) copy_to_user(u, k, sizeof(struct termios))
 
 #endif	/* __ARCH_TERMIO_GETPUT */
 
diff --git a/include/asm-generic/unaligned.h b/include/asm-generic/unaligned.h
index 09ec447fe2af..2fe1b2e67f01 100644
--- a/include/asm-generic/unaligned.h
+++ b/include/asm-generic/unaligned.h
@@ -18,7 +18,8 @@
 #define get_unaligned(ptr) \
 	__get_unaligned((ptr), sizeof(*(ptr)))
 #define put_unaligned(x,ptr) \
-	__put_unaligned((__u64)(x), (ptr), sizeof(*(ptr)))
+	((void)sizeof(*(ptr)=(x)),\
+	__put_unaligned((__force __u64)(x), (ptr), sizeof(*(ptr))))
 
 /*
  * This function doesn't actually exist.  The idea is that when
@@ -78,38 +79,38 @@ static inline void __ustw(__u16 val, __u16 *addr)
 
 #define __get_unaligned(ptr, size) ({		\
 	const void *__gu_p = ptr;		\
-	__u64 val;				\
+	__u64 __val;				\
 	switch (size) {				\
 	case 1:					\
-		val = *(const __u8 *)__gu_p;	\
+		__val = *(const __u8 *)__gu_p;	\
 		break;				\
 	case 2:					\
-		val = __uldw(__gu_p);		\
+		__val = __uldw(__gu_p);		\
 		break;				\
 	case 4:					\
-		val = __uldl(__gu_p);		\
+		__val = __uldl(__gu_p);		\
 		break;				\
 	case 8:					\
-		val = __uldq(__gu_p);		\
+		__val = __uldq(__gu_p);		\
 		break;				\
 	default:				\
 		bad_unaligned_access_length();	\
 	};					\
-	(__typeof__(*(ptr)))val;		\
+	(__force __typeof__(*(ptr)))__val;	\
 })
 
 #define __put_unaligned(val, ptr, size)		\
-do {						\
+({						\
 	void *__gu_p = ptr;			\
 	switch (size) {				\
 	case 1:					\
-		*(__u8 *)__gu_p = val;		\
+		*(__u8 *)__gu_p = (__force __u8)val;		\
 	        break;				\
 	case 2:					\
-		__ustw(val, __gu_p);		\
+		__ustw((__force __u16)val, __gu_p);		\
 		break;				\
 	case 4:					\
-		__ustl(val, __gu_p);		\
+		__ustl((__force __u32)val, __gu_p);		\
 		break;				\
 	case 8:					\
 		__ustq(val, __gu_p);		\
@@ -117,6 +118,7 @@ do {						\
 	default:				\
 	    	bad_unaligned_access_length();	\
 	};					\
-} while(0)
+	(void)0;				\
+})
 
 #endif /* _ASM_GENERIC_UNALIGNED_H */
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 84155eb67f1d..0240e0506a07 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -224,7 +224,11 @@
 	}
 
 #define NOTES								\
-	.notes : { *(.note.*) } :note
+	.notes : AT(ADDR(.notes) - LOAD_OFFSET) {			\
+		VMLINUX_SYMBOL(__start_notes) = .;			\
+		*(.note.*)						\
+		VMLINUX_SYMBOL(__stop_notes) = .;			\
+	}
 
 #define INITCALLS							\
   	*(.initcall0.init)						\
@@ -245,3 +249,11 @@
   	*(.initcall7.init)						\
   	*(.initcall7s.init)
 
+#define PERCPU(align)							\
+	. = ALIGN(align);						\
+	__per_cpu_start = .;						\
+	.data.percpu  : AT(ADDR(.data.percpu) - LOAD_OFFSET) {		\
+		*(.data.percpu)						\
+		*(.data.percpu.shared_aligned)				\
+	}								\
+	__per_cpu_end = .;