linux/include/asm-frv, branch v2.6.26

frv: fix irqs_disabled() to return an int, not an unsigned long

2008-07-12T21:33:42Z

Fix FRV irqs_disabled() to return an int, not an unsigned long to avoid this warning: kernel/sched.c: In function '__might_sleep': kernel/sched.c:8198: warning: format '%d' expects type 'int', but argument 3 has type 'long unsigned int' Signed-off-by: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

FRV: ip_fast_csum() requires a memory clobber on its inline asm

2008-06-05T17:31:21Z

ip_fast_csum() requires a memory clobber on its inline asm as it accesses memory in a fashion that gcc can't predict. The GCC manual says: If your assembler instructions access memory in an unpredictable fashion, add `memory' to the list of clobbered registers. This will cause GCC to not keep memory values cached in registers across the assembler instruction and not optimize stores or loads to that memory. The bug hasn't been noticed in FRV, but it has been seen in PA-RISC. Signed-off-by: David Howells Signed-off-by: Linus Torvalds

Fix FRV minimum slab/kmalloc alignment

2008-05-28T16:05:28Z

> +#define ARCH_KMALLOC_MINALIGN (sizeof(long) * 2) > +#define ARCH_SLAB_MINALIGN (sizeof(long) * 2) This doesn't work if SLAB is selected and slab debugging is enabled as these are passed to the preprocessor, and the preprocessor doesn't understand sizeof. Signed-off-by: Linus Torvalds

FRV: Specify the minimum slab/kmalloc alignment

2008-05-28T14:59:06Z

Specify the minimum slab/kmalloc alignment to be 8 bytes. This fixes a crash when SLOB is selected as the memory allocator. The FRV arch needs this so that it can use the load- and store-double instructions without faulting. By default SLOB sets the minimum to be 4 bytes. Signed-off-by: David Howells Signed-off-by: Linus Torvalds

read_barrier_depends arch fixlets

2008-05-14T17:05:18Z

read_barrie_depends has always been a noop (not a compiler barrier) on all architectures except SMP alpha. This brings UP alpha and frv into line with all other architectures, and fixes incorrect documentation. Signed-off-by: Nick Piggin Acked-by: Paul E. McKenney Signed-off-by: Linus Torvalds

frv: types: use for the frv architecture

2008-05-02T23:18:20Z

This modifies to use the generic include files. Signed-off-by: H. Peter Anvin Cc: David Howells

frv: unbreak misalignment handling changes

2008-05-01T15:03:58Z

Fix a reference in a arch/frv/mm/Makefile to unaligned.c which has now been deleted. Also revert the change to the guard macro name in include/asm-frv/unaligned.h. Signed-off-by: David Howells Cc: Harvey Harrison Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

kernel: Move arches to use common unaligned access

2008-04-29T15:06:27Z

Unaligned access is ok for the following arches: cris, m68k, mn10300, powerpc, s390, x86 Arches that use the memmove implementation for native endian, and the byteshifting for the opposite endianness. h8300, m32r, xtensa Packed struct for native endian, byteshifting for other endian: alpha, blackfin, ia64, parisc, sparc, sparc64, mips, sh m86knommu is generic_be for Coldfire, otherwise unaligned access is ok. frv, arm chooses endianness based on compiler settings, uses the byteshifting versions. Remove the unaligned trap handler from frv as it is now unused. v850 is le, uses the byteshifting versions for both be and le. Remove the now unused asm-generic implementation. Signed-off-by: Harvey Harrison Acked-by: David S. Miller Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: introduce pte_special pte bit

2008-04-28T15:58:23Z

s390 for one, cannot implement VM_MIXEDMAP with pfn_valid, due to their memory model (which is more dynamic than most). Instead, they had proposed to implement it with an additional path through vm_normal_page(), using a bit in the pte to determine whether or not the page should be refcounted: vm_normal_page() { ... if (unlikely(vma->vm_flags & (VM_PFNMAP|VM_MIXEDMAP))) { if (vma->vm_flags & VM_MIXEDMAP) { #ifdef s390 if (!mixedmap_refcount_pte(pte)) return NULL; #else if (!pfn_valid(pfn)) return NULL; #endif goto out; } ... } This is fine, however if we are allowed to use a bit in the pte to determine refcountedness, we can use that to _completely_ replace all the vma based schemes. So instead of adding more cases to the already complex vma-based scheme, we can have a clearly seperate and simple pte-based scheme (and get slightly better code generation in the process): vm_normal_page() { #ifdef s390 if (!mixedmap_refcount_pte(pte)) return NULL; return pte_page(pte); #else ... #endif } And finally, we may rather make this concept usable by any architecture rather than making it s390 only, so implement a new type of pte state for this. Unfortunately the old vma based code must stay, because some architectures may not be able to spare pte bits. This makes vm_normal_page a little bit more ugly than we would like, but the 2 cases are clearly seperate. So introduce a pte_special pte state, and use it in mm/memory.c. It is currently a noop for all architectures, so this doesn't actually result in any compiled code changes to mm/memory.o. BTW: I haven't put vm_normal_page() into arch code as-per an earlier suggestion. The reason is that, regardless of where vm_normal_page is actually implemented, the *abstraction* is still exactly the same. Also, while it depends on whether the architecture has pte_special or not, that is the only two possible cases, and it really isn't an arch specific function -- the role of the arch code should be to provide primitive functions and accessors with which to build the core code; pte_special does that. We do not want architectures to know or care about vm_normal_page itself, and we definitely don't want them being able to invent something new there out of sight of mm/ code. If we made vm_normal_page an arch function, then we have to make vm_insert_mixed (next patch) an arch function too. So I don't think moving it to arch code fundamentally improves any abstractions, while it does practically make the code more difficult to follow, for both mm and arch developers, and easier to misuse. [akpm@linux-foundation.org: build fix] Signed-off-by: Nick Piggin Acked-by: Carsten Otte Cc: Jared Hulbert Cc: Martin Schwidefsky Cc: Heiko Carstens Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

frv: remove HARD_RESET_NOW()

2008-04-21T23:03:13Z

HARD_RESET_NOW() was unused. And one of the few remaining cli() users. Signed-off-by: Adrian Bunk Signed-off-by: David Howells Signed-off-by: Linus Torvalds