diff options
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/irq_vectors.h | 2 | ||||
| -rw-r--r-- | arch/x86/include/asm/uaccess_64.h | 16 |
2 files changed, 15 insertions, 3 deletions
diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors.h index b07278c55e9..8a285f356f8 100644 --- a/arch/x86/include/asm/irq_vectors.h +++ b/arch/x86/include/asm/irq_vectors.h @@ -128,7 +128,7 @@ #ifndef __ASSEMBLY__ static inline int invalid_vm86_irq(int irq) { - return irq < 3 || irq > 15; + return irq < FIRST_VM86_IRQ || irq > LAST_VM86_IRQ; } #endif diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h index 84210c479fc..987a2c10fe2 100644 --- a/arch/x86/include/asm/uaccess_64.h +++ b/arch/x86/include/asm/uaccess_64.h @@ -192,14 +192,26 @@ static inline int __copy_from_user_nocache(void *dst, const void __user *src, unsigned size) { might_sleep(); - return __copy_user_nocache(dst, src, size, 1); + /* + * In practice this limit means that large file write()s + * which get chunked to 4K copies get handled via + * non-temporal stores here. Smaller writes get handled + * via regular __copy_from_user(): + */ + if (likely(size >= PAGE_SIZE)) + return __copy_user_nocache(dst, src, size, 1); + else + return __copy_from_user(dst, src, size); } static inline int __copy_from_user_inatomic_nocache(void *dst, const void __user *src, unsigned size) { - return __copy_user_nocache(dst, src, size, 0); + if (likely(size >= PAGE_SIZE)) + return __copy_user_nocache(dst, src, size, 0); + else + return __copy_from_user_inatomic(dst, src, size); } unsigned long |