Commit 3e99675a authored by Nicolas Pitre's avatar Nicolas Pitre Committed by Russell King
Browse files

ARM: 7582/2: rename kvm_seq to vmalloc_seq so to avoid confusion with KVM 



The kvm_seq value has nothing to do what so ever with this other KVM.
Given that KVM support on ARM is imminent, it's best to rename kvm_seq
into something else to clearly identify what it is about i.e. a sequence
number for vmalloc section mappings.

Signed-off-by: default avatarNicolas Pitre <nico@linaro.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent ce7b1756

arch/arm/include/asm/mmu.h

+1 −1
Original line number Diff line number Diff line
@@ -7,7 +7,7 @@ typedef struct { 
#ifdef CONFIG_CPU_HAS_ASID

	u64 id;

#endif

	unsigned int kvm_seq;

	unsigned int vmalloc_seq;

} mm_context_t;



#ifdef CONFIG_CPU_HAS_ASID

arch/arm/include/asm/mmu_context.h

+3 −3
Original line number Diff line number Diff line
@@ -20,7 +20,7 @@ 
#include <asm/proc-fns.h>

#include <asm-generic/mm_hooks.h>



void __check_kvm_seq(struct mm_struct *mm);

void __check_vmalloc_seq(struct mm_struct *mm);



#ifdef CONFIG_CPU_HAS_ASID
@@ -34,8 +34,8 @@ void check_and_switch_context(struct mm_struct *mm, struct task_struct *tsk); 
static inline void check_and_switch_context(struct mm_struct *mm,

					    struct task_struct *tsk)

{

	if (unlikely(mm->context.kvm_seq != init_mm.context.kvm_seq))

		__check_kvm_seq(mm);

	if (unlikely(mm->context.vmalloc_seq != init_mm.context.vmalloc_seq))

		__check_vmalloc_seq(mm);



	if (irqs_disabled())

		/*

arch/arm/mm/context.c

+2 −2
Original line number Diff line number Diff line
@@ -186,8 +186,8 @@ void check_and_switch_context(struct mm_struct *mm, struct task_struct *tsk) 
	unsigned long flags;

	unsigned int cpu = smp_processor_id();



	if (unlikely(mm->context.kvm_seq != init_mm.context.kvm_seq))

		__check_kvm_seq(mm);

	if (unlikely(mm->context.vmalloc_seq != init_mm.context.vmalloc_seq))

		__check_vmalloc_seq(mm);



	/*

	 * Required during context switch to avoid speculative page table

arch/arm/mm/ioremap.c

+8 −8
Original line number Diff line number Diff line
@@ -47,18 +47,18 @@ int ioremap_page(unsigned long virt, unsigned long phys, 
}

EXPORT_SYMBOL(ioremap_page);



void __check_kvm_seq(struct mm_struct *mm)

void __check_vmalloc_seq(struct mm_struct *mm)

{

	unsigned int seq;



	do {

		seq = init_mm.context.kvm_seq;

		seq = init_mm.context.vmalloc_seq;

		memcpy(pgd_offset(mm, VMALLOC_START),

		       pgd_offset_k(VMALLOC_START),

		       sizeof(pgd_t) * (pgd_index(VMALLOC_END) -

					pgd_index(VMALLOC_START)));

		mm->context.kvm_seq = seq;

	} while (seq != init_mm.context.kvm_seq);

		mm->context.vmalloc_seq = seq;

	} while (seq != init_mm.context.vmalloc_seq);

}



#if !defined(CONFIG_SMP) && !defined(CONFIG_ARM_LPAE)
@@ -89,13 +89,13 @@ static void unmap_area_sections(unsigned long virt, unsigned long size) 
		if (!pmd_none(pmd)) {

			/*

			 * Clear the PMD from the page table, and

			 * increment the kvm sequence so others

			 * increment the vmalloc sequence so others

			 * notice this change.

			 *

			 * Note: this is still racy on SMP machines.

			 */

			pmd_clear(pmdp);

			init_mm.context.kvm_seq++;

			init_mm.context.vmalloc_seq++;



			/*

			 * Free the page table, if there was one.
@@ -112,8 +112,8 @@ static void unmap_area_sections(unsigned long virt, unsigned long size) 
	 * Ensure that the active_mm is up to date - we want to

	 * catch any use-after-iounmap cases.

	 */

	if (current->active_mm->context.kvm_seq != init_mm.context.kvm_seq)

		__check_kvm_seq(current->active_mm);

	if (current->active_mm->context.vmalloc_seq != init_mm.context.vmalloc_seq)

		__check_vmalloc_seq(current->active_mm);



	flush_tlb_kernel_range(virt, end);

}

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