From a8e23a291852cd7c4fb5ca696dbb93912185ad10 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 27 Oct 2010 15:32:57 -0700 Subject: mm,x86: fix kmap_atomic_push vs ioremap_32.c It appears i386 uses kmap_atomic infrastructure regardless of CONFIG_HIGHMEM which results in a compile error when highmem is disabled. Cure this by providing the needed few bits for both CONFIG_HIGHMEM and CONFIG_X86_32. Signed-off-by: Peter Zijlstra Reported-by: Chris Wilson Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/highmem.h | 46 +++++++++++++++++++++++++--------------------- 1 file changed, 25 insertions(+), 21 deletions(-) (limited to 'include') diff --git a/include/linux/highmem.h b/include/linux/highmem.h index 8a85ec109a3..102f76be90d 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -37,27 +37,6 @@ extern unsigned long totalhigh_pages; void kmap_flush_unused(void); -DECLARE_PER_CPU(int, __kmap_atomic_idx); - -static inline int kmap_atomic_idx_push(void) -{ - int idx = __get_cpu_var(__kmap_atomic_idx)++; -#ifdef CONFIG_DEBUG_HIGHMEM - WARN_ON_ONCE(in_irq() && !irqs_disabled()); - BUG_ON(idx > KM_TYPE_NR); -#endif - return idx; -} - -static inline int kmap_atomic_idx_pop(void) -{ - int idx = --__get_cpu_var(__kmap_atomic_idx); -#ifdef CONFIG_DEBUG_HIGHMEM - BUG_ON(idx < 0); -#endif - return idx; -} - #else /* CONFIG_HIGHMEM */ static inline unsigned int nr_free_highpages(void) { return 0; } @@ -95,6 +74,31 @@ static inline void __kunmap_atomic(void *addr) #endif /* CONFIG_HIGHMEM */ +#if defined(CONFIG_HIGHMEM) || defined(CONFIG_X86_32) + +DECLARE_PER_CPU(int, __kmap_atomic_idx); + +static inline int kmap_atomic_idx_push(void) +{ + int idx = __get_cpu_var(__kmap_atomic_idx)++; +#ifdef CONFIG_DEBUG_HIGHMEM + WARN_ON_ONCE(in_irq() && !irqs_disabled()); + BUG_ON(idx > KM_TYPE_NR); +#endif + return idx; +} + +static inline int kmap_atomic_idx_pop(void) +{ + int idx = --__get_cpu_var(__kmap_atomic_idx); +#ifdef CONFIG_DEBUG_HIGHMEM + BUG_ON(idx < 0); +#endif + return idx; +} + +#endif + /* * Make both: kmap_atomic(page, idx) and kmap_atomic(page) work. */ -- cgit v1.2.3