[PATCH 07/16] mm/arm: use vm_flags_t for vma flags

Konstantin Khlebnikov
2012-03-21T06:56:48Z

Cast vm_flags to unsigned int for __cpuc_flush_user_range(),
because its vm_flags argument declared as unsigned int.
Asssembler code wants to test VM_EXEC bit on vma->vm_flags,
but for big-endian we should get upper word for this.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
---
arch/arm/include/asm/cacheflush.h | 5 +++--
arch/arm/kernel/asm-offsets.c | 6 +++++-
arch/arm/mm/fault.c | 2 +-
3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h
index d5d8d5c..5aab2c4 100644
--- a/arch/arm/include/asm/cacheflush.h
+++ b/arch/arm/include/asm/cacheflush.h
@@ -217,7 +217,7 @@ vivt_flush_cache_range(struct vm_area_struct *vma, unsigned long start, unsigned
{
if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm)))
__cpuc_flush_user_range(start & PAGE_MASK, PAGE_ALIGN(end),
- vma->vm_flags);
+ (__force unsigned int)vma->vm_flags);
}

static inline void
@@ -225,7 +225,8 @@ vivt_flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsig
{
if (cpumask_test_cpu(smp_processor_id(), mm_cpumask(vma->vm_mm))) {
unsigned long addr = user_addr & PAGE_MASK;
- __cpuc_flush_user_range(addr, addr + PAGE_SIZE, vma->vm_flags);
+ __cpuc_flush_user_range(addr, addr + PAGE_SIZE,
+ (__force unsigned int)vma->vm_flags);
}
}

diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c
index 1429d89..8150c7e 100644
--- a/arch/arm/kernel/asm-offsets.c
+++ b/arch/arm/kernel/asm-offsets.c
@@ -109,9 +109,13 @@ int main(void)
BLANK();
#endif
DEFINE(VMA_VM_MM, offsetof(struct vm_area_struct, vm_mm));
+#if defined(CONFIG_CPU_BIG_ENDIAN) && (NR_VMA_FLAGS > 32)
+ DEFINE(VMA_VM_FLAGS, offsetof(struct vm_area_struct, vm_flags) + 4);
+#else
DEFINE(VMA_VM_FLAGS, offsetof(struct vm_area_struct, vm_flags));
+#endif
BLANK();
- DEFINE(VM_EXEC, VM_EXEC);
+ DEFINE(VM_EXEC, (__force unsigned int)VM_EXEC);
BLANK();
DEFINE(PAGE_SZ, PAGE_SIZE);
BLANK();
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index 40c43a9..371ad65 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -209,7 +209,7 @@ void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
*/
static inline bool access_error(unsigned int fsr, struct vm_area_struct *vma)
{
- unsigned int mask = VM_READ | VM_WRITE | VM_EXEC;
+ vm_flags_t mask = VM_READ | VM_WRITE | VM_EXEC;

if (fsr & FSR_WRITE)
mask = VM_WRITE;