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authorLinus Torvalds <torvalds@linux-foundation.org>2010-08-06 10:17:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-06 10:17:52 -0700
commit9faa1e5942fd647b0dd2fbbdcc04988841cacaf3 (patch)
tree3a2e467b04b7e66c9ef233e8c8b286278ef79adf /arch
parentd9a73c00161f3eaa4c8c035c62f45afd1549e38a (diff)
parent3709c857350976408953831f0cf89d19951394a1 (diff)
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Ioremap: fix wrong physical address handling in PAT code x86, tlb: Clean up and correct used type x86, iomap: Fix wrong page aligned size calculation in ioremapping code x86, mm: Create symbolic index into address_markers array x86, ioremap: Fix normal ram range check x86, ioremap: Fix incorrect physical address handling in PAE mode x86-64, mm: Initialize VDSO earlier on 64 bits x86, kmmio/mmiotrace: Fix double free of kmmio_fault_pages
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/mm/dump_pagetables.c32
-rw-r--r--arch/x86/mm/ioremap.c14
-rw-r--r--arch/x86/mm/kmmio.c16
-rw-r--r--arch/x86/mm/pat.c2
-rw-r--r--arch/x86/mm/testmmiotrace.c22
-rw-r--r--arch/x86/mm/tlb.c4
-rw-r--r--arch/x86/vdso/vdso32-setup.c2
-rw-r--r--arch/x86/vdso/vma.c2
8 files changed, 71 insertions, 23 deletions
diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c
index a725b7f760a..0002a3a3308 100644
--- a/arch/x86/mm/dump_pagetables.c
+++ b/arch/x86/mm/dump_pagetables.c
@@ -37,6 +37,28 @@ struct addr_marker {
const char *name;
};
+/* indices for address_markers; keep sync'd w/ address_markers below */
+enum address_markers_idx {
+ USER_SPACE_NR = 0,
+#ifdef CONFIG_X86_64
+ KERNEL_SPACE_NR,
+ LOW_KERNEL_NR,
+ VMALLOC_START_NR,
+ VMEMMAP_START_NR,
+ HIGH_KERNEL_NR,
+ MODULES_VADDR_NR,
+ MODULES_END_NR,
+#else
+ KERNEL_SPACE_NR,
+ VMALLOC_START_NR,
+ VMALLOC_END_NR,
+# ifdef CONFIG_HIGHMEM
+ PKMAP_BASE_NR,
+# endif
+ FIXADDR_START_NR,
+#endif
+};
+
/* Address space markers hints */
static struct addr_marker address_markers[] = {
{ 0, "User Space" },
@@ -331,14 +353,12 @@ static int pt_dump_init(void)
#ifdef CONFIG_X86_32
/* Not a compile-time constant on x86-32 */
- address_markers[2].start_address = VMALLOC_START;
- address_markers[3].start_address = VMALLOC_END;
+ address_markers[VMALLOC_START_NR].start_address = VMALLOC_START;
+ address_markers[VMALLOC_END_NR].start_address = VMALLOC_END;
# ifdef CONFIG_HIGHMEM
- address_markers[4].start_address = PKMAP_BASE;
- address_markers[5].start_address = FIXADDR_START;
-# else
- address_markers[4].start_address = FIXADDR_START;
+ address_markers[PKMAP_BASE_NR].start_address = PKMAP_BASE;
# endif
+ address_markers[FIXADDR_START_NR].start_address = FIXADDR_START;
#endif
pe = debugfs_create_file("kernel_page_tables", 0600, NULL, NULL,
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 12e4d2d3c11..3ba6e0608c5 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -62,8 +62,8 @@ int ioremap_change_attr(unsigned long vaddr, unsigned long size,
static void __iomem *__ioremap_caller(resource_size_t phys_addr,
unsigned long size, unsigned long prot_val, void *caller)
{
- unsigned long pfn, offset, vaddr;
- resource_size_t last_addr;
+ unsigned long offset, vaddr;
+ resource_size_t pfn, last_pfn, last_addr;
const resource_size_t unaligned_phys_addr = phys_addr;
const unsigned long unaligned_size = size;
struct vm_struct *area;
@@ -100,10 +100,8 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr,
/*
* Don't allow anybody to remap normal RAM that we're using..
*/
- for (pfn = phys_addr >> PAGE_SHIFT;
- (pfn << PAGE_SHIFT) < (last_addr & PAGE_MASK);
- pfn++) {
-
+ last_pfn = last_addr >> PAGE_SHIFT;
+ for (pfn = phys_addr >> PAGE_SHIFT; pfn <= last_pfn; pfn++) {
int is_ram = page_is_ram(pfn);
if (is_ram && pfn_valid(pfn) && !PageReserved(pfn_to_page(pfn)))
@@ -115,7 +113,7 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr,
* Mappings have to be page-aligned
*/
offset = phys_addr & ~PAGE_MASK;
- phys_addr &= PAGE_MASK;
+ phys_addr &= PHYSICAL_PAGE_MASK;
size = PAGE_ALIGN(last_addr+1) - phys_addr;
retval = reserve_memtype(phys_addr, (u64)phys_addr + size,
@@ -613,7 +611,7 @@ void __init early_iounmap(void __iomem *addr, unsigned long size)
return;
}
offset = virt_addr & ~PAGE_MASK;
- nrpages = PAGE_ALIGN(offset + size - 1) >> PAGE_SHIFT;
+ nrpages = PAGE_ALIGN(offset + size) >> PAGE_SHIFT;
idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*slot;
while (nrpages > 0) {
diff --git a/arch/x86/mm/kmmio.c b/arch/x86/mm/kmmio.c
index 5d0e67fff1a..e5d5e2ce9f7 100644
--- a/arch/x86/mm/kmmio.c
+++ b/arch/x86/mm/kmmio.c
@@ -45,6 +45,8 @@ struct kmmio_fault_page {
* Protected by kmmio_lock, when linked into kmmio_page_table.
*/
int count;
+
+ bool scheduled_for_release;
};
struct kmmio_delayed_release {
@@ -398,8 +400,11 @@ static void release_kmmio_fault_page(unsigned long page,
BUG_ON(f->count < 0);
if (!f->count) {
disarm_kmmio_fault_page(f);
- f->release_next = *release_list;
- *release_list = f;
+ if (!f->scheduled_for_release) {
+ f->release_next = *release_list;
+ *release_list = f;
+ f->scheduled_for_release = true;
+ }
}
}
@@ -471,8 +476,10 @@ static void remove_kmmio_fault_pages(struct rcu_head *head)
prevp = &f->release_next;
} else {
*prevp = f->release_next;
+ f->release_next = NULL;
+ f->scheduled_for_release = false;
}
- f = f->release_next;
+ f = *prevp;
}
spin_unlock_irqrestore(&kmmio_lock, flags);
@@ -510,6 +517,9 @@ void unregister_kmmio_probe(struct kmmio_probe *p)
kmmio_count--;
spin_unlock_irqrestore(&kmmio_lock, flags);
+ if (!release_list)
+ return;
+
drelease = kmalloc(sizeof(*drelease), GFP_ATOMIC);
if (!drelease) {
pr_crit("leaking kmmio_fault_page objects.\n");
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 64121a18b8c..f6ff57b7efa 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -158,7 +158,7 @@ static unsigned long pat_x_mtrr_type(u64 start, u64 end, unsigned long req_type)
return req_type;
}
-static int pat_pagerange_is_ram(unsigned long start, unsigned long end)
+static int pat_pagerange_is_ram(resource_size_t start, resource_size_t end)
{
int ram_page = 0, not_rampage = 0;
unsigned long page_nr;
diff --git a/arch/x86/mm/testmmiotrace.c b/arch/x86/mm/testmmiotrace.c
index 8565d944f7c..38868adf07e 100644
--- a/arch/x86/mm/testmmiotrace.c
+++ b/arch/x86/mm/testmmiotrace.c
@@ -90,6 +90,27 @@ static void do_test(unsigned long size)
iounmap(p);
}
+/*
+ * Tests how mmiotrace behaves in face of multiple ioremap / iounmaps in
+ * a short time. We had a bug in deferred freeing procedure which tried
+ * to free this region multiple times (ioremap can reuse the same address
+ * for many mappings).
+ */
+static void do_test_bulk_ioremapping(void)
+{
+ void __iomem *p;
+ int i;
+
+ for (i = 0; i < 10; ++i) {
+ p = ioremap_nocache(mmio_address, PAGE_SIZE);
+ if (p)
+ iounmap(p);
+ }
+
+ /* Force freeing. If it will crash we will know why. */
+ synchronize_rcu();
+}
+
static int __init init(void)
{
unsigned long size = (read_far) ? (8 << 20) : (16 << 10);
@@ -104,6 +125,7 @@ static int __init init(void)
"and writing 16 kB of rubbish in there.\n",
size >> 10, mmio_address);
do_test(size);
+ do_test_bulk_ioremapping();
pr_info("All done.\n");
return 0;
}
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index 426f3a1a64d..c03f14ab666 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -278,11 +278,9 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long va)
static void do_flush_tlb_all(void *info)
{
- unsigned long cpu = smp_processor_id();
-
__flush_tlb_all();
if (percpu_read(cpu_tlbstate.state) == TLBSTATE_LAZY)
- leave_mm(cpu);
+ leave_mm(smp_processor_id());
}
void flush_tlb_all(void)
diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/vdso/vdso32-setup.c
index 02b442e9200..36df991985b 100644
--- a/arch/x86/vdso/vdso32-setup.c
+++ b/arch/x86/vdso/vdso32-setup.c
@@ -374,7 +374,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
#ifdef CONFIG_X86_64
-__initcall(sysenter_setup);
+subsys_initcall(sysenter_setup);
#ifdef CONFIG_SYSCTL
/* Register vsyscall32 into the ABI table */
diff --git a/arch/x86/vdso/vma.c b/arch/x86/vdso/vma.c
index ac74869b814..43456ee1769 100644
--- a/arch/x86/vdso/vma.c
+++ b/arch/x86/vdso/vma.c
@@ -74,7 +74,7 @@ static int __init init_vdso_vars(void)
vdso_enabled = 0;
return -ENOMEM;
}
-__initcall(init_vdso_vars);
+subsys_initcall(init_vdso_vars);
struct linux_binprm;