diff options
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/bitops/sched.h | 21 | ||||
| -rw-r--r-- | include/asm-generic/pgtable.h | 17 | ||||
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 10 |
3 files changed, 27 insertions, 21 deletions
diff --git a/include/asm-generic/bitops/sched.h b/include/asm-generic/bitops/sched.h index 815bb014806..604fab7031a 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/pgtable.h b/include/asm-generic/pgtable.h index dc8f99ee305..7d7bcf990e9 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -27,13 +27,20 @@ do { \ * Largely same as above, but only sets the access flags (dirty, * accessed, and writable). Furthermore, we know it always gets set * to a "more permissive" setting, which allows most architectures - * to optimize this. + * to optimize this. We return whether the PTE actually changed, which + * in turn instructs the caller to do things like update__mmu_cache. + * This used to be done in the caller, but sparc needs minor faults to + * force that call on sun4c so we changed this macro slightly */ #define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \ -do { \ - set_pte_at((__vma)->vm_mm, (__address), __ptep, __entry); \ - flush_tlb_page(__vma, __address); \ -} while (0) +({ \ + int __changed = !pte_same(*(__ptep), __entry); \ + if (__changed) { \ + set_pte_at((__vma)->vm_mm, (__address), __ptep, __entry); \ + flush_tlb_page(__vma, __address); \ + } \ + __changed; \ +}) #endif #ifndef __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 8307b1bb337..84155eb67f1 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -14,8 +14,8 @@ *(.data) \ *(.data.init.refok) -#define RODATA \ - . = ALIGN(4096); \ +#define RO_DATA(align) \ + . = ALIGN((align)); \ .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ VMLINUX_SYMBOL(__start_rodata) = .; \ *(.rodata) *(.rodata.*) \ @@ -135,7 +135,11 @@ VMLINUX_SYMBOL(__end_rodata) = .; \ } \ \ - . = ALIGN(4096); + . = ALIGN((align)); + +/* RODATA provided for backward compatibility. + * All archs are supposed to use RO_DATA() */ +#define RODATA RO_DATA(4096) #define SECURITY_INIT \ .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ |