search for: kunmap_local_indexed

...2a15ba82fa6c ("ARM: highmem: Switch to generic kmap atomic"). However it causes a following warning on my test boards (Samsung Exynos SoC based): Run /sbin/init as init process INIT: version 2.88 booting ------------[ cut here ]------------ WARNING: CPU: 3 PID: 120 at mm/highmem.c:502 kunmap_local_indexed+0x194/0x1d0 Modules linked in: CPU: 3 PID: 120 Comm: init Not tainted 5.10.0-rc2-00010-g2a15ba82fa6c #1924 Hardware name: Samsung Exynos (Flattened Device Tree) [<c0111514>] (unwind_backtrace) from [<c010ceb8>] (show_stack+0x10/0x14) [<c010ceb8>] (show_stack) from [<c0b1b408&gt...

...lidate_kernel_vma #include <asm/kmap_types.h> +/* + * Outside of CONFIG_HIGHMEM to support X86 32bit iomap_atomic() cruft. + */ +#ifdef CONFIG_KMAP_LOCAL +void *__kmap_local_pfn_prot(unsigned long pfn, pgprot_t prot); +void *__kmap_local_page_prot(struct page *page, pgprot_t prot); +void kunmap_local_indexed(void *vaddr); +#endif + #ifdef CONFIG_HIGHMEM -extern void *kmap_atomic_high_prot(struct page *page, pgprot_t prot); -extern void kunmap_atomic_high(void *kvaddr); #include <asm/highmem.h> #ifndef ARCH_HAS_KMAP_FLUSH_TLB @@ -81,6 +88,11 @@ static inline void kunmap(struct page *p * be...

...; +} + +static inline void *kmap_local_page_prot(struct page *page, pgprot_t prot) +{ + return __kmap_local_page_prot(page, prot); +} + +static inline void *kmap_local_pfn(unsigned long pfn) +{ + return __kmap_local_pfn_prot(pfn, kmap_prot); +} + +static inline void __kunmap_local(void *vaddr) +{ + kunmap_local_indexed(vaddr); +} + static inline void *kmap_atomic_prot(struct page *page, pgprot_t prot) { preempt_disable(); @@ -141,6 +161,28 @@ static inline void kunmap(struct page *p #endif } +static inline void *kmap_local_page(struct page *page) +{ + return page_address(page); +} + +static inline void *k...

...+++++++++++---- 6 files changed, 129 insertions(+), 10 deletions(-) --- a/include/linux/highmem-internal.h +++ b/include/linux/highmem-internal.h @@ -9,6 +9,16 @@ void *__kmap_local_pfn_prot(unsigned long pfn, pgprot_t prot); void *__kmap_local_page_prot(struct page *page, pgprot_t prot); void kunmap_local_indexed(void *vaddr); +void kmap_local_fork(struct task_struct *tsk); +void __kmap_local_sched_out(void); +void __kmap_local_sched_in(void); +static inline void kmap_assert_nomap(void) +{ + DEBUG_LOCKS_WARN_ON(current->kmap_ctrl.idx); +} +#else +static inline void kmap_local_fork(struct task_struct *tsk...

...s(-) --- a/arch/x86/include/asm/iomap.h +++ b/arch/x86/include/asm/iomap.h @@ -13,14 +13,7 @@ #include <asm/cacheflush.h> #include <asm/tlbflush.h> -void __iomem *iomap_atomic_pfn_prot(unsigned long pfn, pgprot_t prot); - -static inline void iounmap_atomic(void __iomem *vaddr) -{ - kunmap_local_indexed((void __force *)vaddr); - pagefault_enable(); - preempt_enable(); -} +void __iomem *__iomap_local_pfn_prot(unsigned long pfn, pgprot_t prot); int iomap_create_wc(resource_size_t base, unsigned long size, pgprot_t *prot); --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -44,7 +44,7...

..._HIGHMEM_INTERNAL_H +#define _LINUX_HIGHMEM_INTERNAL_H + +/* + * Outside of CONFIG_HIGHMEM to support X86 32bit iomap_atomic() cruft. + */ +#ifdef CONFIG_KMAP_LOCAL +void *__kmap_local_pfn_prot(unsigned long pfn, pgprot_t prot); +void *__kmap_local_page_prot(struct page *page, pgprot_t prot); +void kunmap_local_indexed(void *vaddr); +#endif + +#ifdef CONFIG_HIGHMEM +#include <asm/highmem.h> + +#ifndef ARCH_HAS_KMAP_FLUSH_TLB +static inline void kmap_flush_tlb(unsigned long addr) { } +#endif + +#ifndef kmap_prot +#define kmap_prot PAGE_KERNEL +#endif + +void *kmap_high(struct page *page); +void kunmap_high(s...

Following up to the discussion in: https://lore.kernel.org/r/20200914204209.256266093 at linutronix.de and the second version of this: https://lore.kernel.org/r/20201029221806.189523375 at linutronix.de this series provides a preemptible variant of kmap_atomic & related interfaces. This is achieved by: - Removing the RT dependency from migrate_disable/enable() - Consolidating all

Following up to the discussion in: https://lore.kernel.org/r/20200914204209.256266093 at linutronix.de and the second version of this: https://lore.kernel.org/r/20201029221806.189523375 at linutronix.de this series provides a preemptible variant of kmap_atomic & related interfaces. This is achieved by: - Removing the RT dependency from migrate_disable/enable() - Consolidating all

Following up to the discussion in: https://lore.kernel.org/r/20200914204209.256266093 at linutronix.de and the second version of this: https://lore.kernel.org/r/20201029221806.189523375 at linutronix.de this series provides a preemptible variant of kmap_atomic & related interfaces. This is achieved by: - Removing the RT dependency from migrate_disable/enable() - Consolidating all

...ne void *kmap_atomic(struct page *page) { - preempt_disable(); - pagefault_disable(); - return __kmap_local_page_prot(page, prot); + return kmap_atomic_prot(page, kmap_prot); } static inline void *kmap_atomic_pfn(unsigned long pfn) @@ -125,13 +110,6 @@ static inline void __kunmap_atomic(void kunmap_local_indexed(addr); } -#endif /* CONFIG_KMAP_LOCAL */ - -static inline void *kmap_atomic(struct page *page) -{ - return kmap_atomic_prot(page, kmap_prot); -} - /* declarations for linux/mm/highmem.c */ unsigned int nr_free_highpages(void); extern atomic_long_t _totalhigh_pages; @@ -212,41 +190,8 @@ static...