[GIT PULL] x86 fixes

From: Ingo Molnar
Date: Tue Aug 04 2009 - 14:55:34 EST

Linus,

Please pull the latest x86-fixes-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git x86-fixes-for-linus

Thanks,

Ingo

------------------>
Borislav Petkov (1):
x86, msr: execute on the correct CPU subset

H. Peter Anvin (2):
x86: Fix assert syntax in vmlinux.lds.S
x86: fix assembly constraints in native_save_fl()

Jack Steiner (5):
x86, UV: Handle missing blade-local memory correctly
x86, UV: Delete mapping of MMR rangs mapped by BIOS
x86, UV: Fix macros for accessing large node numbers
x86, UV: Fix UV apic mode
x86, UV: Complete IRQ interrupt migration in arch_enable_uv_irq()

Jan Beulich (1):
x86, 32-bit: Fix double accounting in reserve_top_address()

Pallipadi, Venkatesh (1):
x86, pat: Fix set_memory_wc related corruption

Paul Mackerras (2):
x86: Add quirk to make Apple MacBook5,2 use reboot=pci
x86: Make 64-bit efi_ioremap use ioremap on MMIO regions

Robert Richter (1):
x86: fix section mismatch for i386 init code

Subrata Modak (1):
x86: Work around compilation warning in arch/x86/kernel/apm_32.c

Thomas Hellstrom (1):
x86: Fix CPA memtype reserving in the set_pages_array*() cases

Yinghai Lu (1):
x86: Don't use current_cpu_data in x2apic phys_pkg_id


arch/x86/include/asm/efi.h | 5 ++-
arch/x86/include/asm/irqflags.h | 8 ++++++-
arch/x86/include/asm/uv/uv_hub.h | 9 ++++++-
arch/x86/kernel/apic/io_apic.c | 3 ++
arch/x86/kernel/apic/x2apic_cluster.c | 2 +-
arch/x86/kernel/apic/x2apic_phys.c | 2 +-
arch/x86/kernel/apic/x2apic_uv_x.c | 38 ++++++--------------------------
arch/x86/kernel/apm_32.c | 2 +-
arch/x86/kernel/efi.c | 2 +-
arch/x86/kernel/efi_64.c | 6 ++++-
arch/x86/kernel/head_32.S | 6 ++++-
arch/x86/kernel/reboot.c | 34 +++++++++++++++++++++++++++-
arch/x86/kernel/vmlinux.lds.S | 16 ++++++------
arch/x86/lib/msr.c | 26 ++++++++-------------
arch/x86/mm/pageattr.c | 39 ++++++++++++++++++++++----------
arch/x86/mm/pgtable.c | 1 -
16 files changed, 120 insertions(+), 79 deletions(-)

diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index edc90f2..8406ed7 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -33,7 +33,7 @@ extern unsigned long asmlinkage efi_call_phys(void *, ...);
#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6) \
efi_call_virt(f, a1, a2, a3, a4, a5, a6)

-#define efi_ioremap(addr, size) ioremap_cache(addr, size)
+#define efi_ioremap(addr, size, type) ioremap_cache(addr, size)

#else /* !CONFIG_X86_32 */

@@ -84,7 +84,8 @@ extern u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3,
efi_call6((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
(u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))

-extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size);
+extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
+ u32 type);

#endif /* CONFIG_X86_32 */

diff --git a/arch/x86/include/asm/irqflags.h b/arch/x86/include/asm/irqflags.h
index 2bdab21..c6ccbe7 100644
--- a/arch/x86/include/asm/irqflags.h
+++ b/arch/x86/include/asm/irqflags.h
@@ -12,9 +12,15 @@ static inline unsigned long native_save_fl(void)
{
unsigned long flags;

+ /*
+ * Note: this needs to be "=r" not "=rm", because we have the
+ * stack offset from what gcc expects at the time the "pop" is
+ * executed, and so a memory reference with respect to the stack
+ * would end up using the wrong address.
+ */
asm volatile("# __raw_save_flags\n\t"
"pushf ; pop %0"
- : "=g" (flags)
+ : "=r" (flags)
: /* no input */
: "memory");

diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h
index 341070f..77a6850 100644
--- a/arch/x86/include/asm/uv/uv_hub.h
+++ b/arch/x86/include/asm/uv/uv_hub.h
@@ -175,7 +175,7 @@ DECLARE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
#define UV_GLOBAL_MMR32_PNODE_BITS(p) ((p) << (UV_GLOBAL_MMR32_PNODE_SHIFT))

#define UV_GLOBAL_MMR64_PNODE_BITS(p) \
- ((unsigned long)(UV_PNODE_TO_GNODE(p)) << UV_GLOBAL_MMR64_PNODE_SHIFT)
+ (((unsigned long)(p)) << UV_GLOBAL_MMR64_PNODE_SHIFT)

#define UV_APIC_PNODE_SHIFT 6

@@ -327,6 +327,7 @@ struct uv_blade_info {
unsigned short nr_possible_cpus;
unsigned short nr_online_cpus;
unsigned short pnode;
+ short memory_nid;
};
extern struct uv_blade_info *uv_blade_info;
extern short *uv_node_to_blade;
@@ -363,6 +364,12 @@ static inline int uv_blade_to_pnode(int bid)
return uv_blade_info[bid].pnode;
}

+/* Nid of memory node on blade. -1 if no blade-local memory */
+static inline int uv_blade_to_memory_nid(int bid)
+{
+ return uv_blade_info[bid].memory_nid;
+}
+
/* Determine the number of possible cpus on a blade */
static inline int uv_blade_nr_possible_cpus(int bid)
{
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 2284a48..d2ed6c5 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -3793,6 +3793,9 @@ int arch_enable_uv_irq(char *irq_name, unsigned int irq, int cpu, int mmr_blade,
mmr_pnode = uv_blade_to_pnode(mmr_blade);
uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value);

+ if (cfg->move_in_progress)
+ send_cleanup_vector(cfg);
+
return irq;
}

diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index 8e4cbb2..2ed4e2b 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -170,7 +170,7 @@ static unsigned long set_apic_id(unsigned int id)

static int x2apic_cluster_phys_pkg_id(int initial_apicid, int index_msb)
{
- return current_cpu_data.initial_apicid >> index_msb;
+ return initial_apicid >> index_msb;
}

static void x2apic_send_IPI_self(int vector)
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
index a284359..0b631c6 100644
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -162,7 +162,7 @@ static unsigned long set_apic_id(unsigned int id)

static int x2apic_phys_pkg_id(int initial_apicid, int index_msb)
{
- return current_cpu_data.initial_apicid >> index_msb;
+ return initial_apicid >> index_msb;
}

static void x2apic_send_IPI_self(int vector)
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 096d19a..832e908 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -261,7 +261,7 @@ struct apic apic_x2apic_uv_x = {
.apic_id_registered = uv_apic_id_registered,

.irq_delivery_mode = dest_Fixed,
- .irq_dest_mode = 1, /* logical */
+ .irq_dest_mode = 0, /* physical */

.target_cpus = uv_target_cpus,
.disable_esr = 0,
@@ -362,12 +362,6 @@ static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
BUG();
}

-static __init void map_low_mmrs(void)
-{
- init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE);
- init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE);
-}
-
enum map_type {map_wb, map_uc};

static __init void map_high(char *id, unsigned long base, int shift,
@@ -395,26 +389,6 @@ static __init void map_gru_high(int max_pnode)
map_high("GRU", gru.s.base, shift, max_pnode, map_wb);
}

-static __init void map_config_high(int max_pnode)
-{
- union uvh_rh_gam_cfg_overlay_config_mmr_u cfg;
- int shift = UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR_BASE_SHFT;
-
- cfg.v = uv_read_local_mmr(UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR);
- if (cfg.s.enable)
- map_high("CONFIG", cfg.s.base, shift, max_pnode, map_uc);
-}
-
-static __init void map_mmr_high(int max_pnode)
-{
- union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
- int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;
-
- mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
- if (mmr.s.enable)
- map_high("MMR", mmr.s.base, shift, max_pnode, map_uc);
-}
-
static __init void map_mmioh_high(int max_pnode)
{
union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
@@ -566,8 +540,6 @@ void __init uv_system_init(void)
unsigned long mmr_base, present, paddr;
unsigned short pnode_mask;

- map_low_mmrs();
-
m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
m_val = m_n_config.s.m_skt;
n_val = m_n_config.s.n_skt;
@@ -591,6 +563,8 @@ void __init uv_system_init(void)
bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
uv_blade_info = kmalloc(bytes, GFP_KERNEL);
BUG_ON(!uv_blade_info);
+ for (blade = 0; blade < uv_num_possible_blades(); blade++)
+ uv_blade_info[blade].memory_nid = -1;

get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);

@@ -629,6 +603,9 @@ void __init uv_system_init(void)
lcpu = uv_blade_info[blade].nr_possible_cpus;
uv_blade_info[blade].nr_possible_cpus++;

+ /* Any node on the blade, else will contain -1. */
+ uv_blade_info[blade].memory_nid = nid;
+
uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
uv_cpu_hub_info(cpu)->lowmem_remap_top = lowmem_redir_size;
uv_cpu_hub_info(cpu)->m_val = m_val;
@@ -662,11 +639,10 @@ void __init uv_system_init(void)
pnode = (paddr >> m_val) & pnode_mask;
blade = boot_pnode_to_blade(pnode);
uv_node_to_blade[nid] = blade;
+ max_pnode = max(pnode, max_pnode);
}

map_gru_high(max_pnode);
- map_mmr_high(max_pnode);
- map_config_high(max_pnode);
map_mmioh_high(max_pnode);

uv_cpu_init();
diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
index 79302e9..442b550 100644
--- a/arch/x86/kernel/apm_32.c
+++ b/arch/x86/kernel/apm_32.c
@@ -811,7 +811,7 @@ static int apm_do_idle(void)
u8 ret = 0;
int idled = 0;
int polling;
- int err;
+ int err = 0;

polling = !!(current_thread_info()->status & TS_POLLING);
if (polling) {
diff --git a/arch/x86/kernel/efi.c b/arch/x86/kernel/efi.c
index 96f7ac0..19ccf6d 100644
--- a/arch/x86/kernel/efi.c
+++ b/arch/x86/kernel/efi.c
@@ -512,7 +512,7 @@ void __init efi_enter_virtual_mode(void)
&& end_pfn <= max_pfn_mapped))
va = __va(md->phys_addr);
else
- va = efi_ioremap(md->phys_addr, size);
+ va = efi_ioremap(md->phys_addr, size, md->type);

md->virt_addr = (u64) (unsigned long) va;

diff --git a/arch/x86/kernel/efi_64.c b/arch/x86/kernel/efi_64.c
index 22c3b78..ac0621a 100644
--- a/arch/x86/kernel/efi_64.c
+++ b/arch/x86/kernel/efi_64.c
@@ -98,10 +98,14 @@ void __init efi_call_phys_epilog(void)
early_runtime_code_mapping_set_exec(0);
}

-void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size)
+void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size,
+ u32 type)
{
unsigned long last_map_pfn;

+ if (type == EFI_MEMORY_MAPPED_IO)
+ return ioremap(phys_addr, size);
+
last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size);
if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size)
return NULL;
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index 8663afb..0d98a01 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -602,7 +602,11 @@ ignore_int:
#endif
iret

-.section .cpuinit.data,"wa"
+#ifndef CONFIG_HOTPLUG_CPU
+ __CPUINITDATA
+#else
+ __REFDATA
+#endif
.align 4
ENTRY(initial_code)
.long i386_start_kernel
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 508e982..834c9da 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -3,6 +3,7 @@
#include <linux/init.h>
#include <linux/pm.h>
#include <linux/efi.h>
+#include <linux/dmi.h>
#include <acpi/reboot.h>
#include <asm/io.h>
#include <asm/apic.h>
@@ -17,7 +18,6 @@
#include <asm/cpu.h>

#ifdef CONFIG_X86_32
-# include <linux/dmi.h>
# include <linux/ctype.h>
# include <linux/mc146818rtc.h>
#else
@@ -404,6 +404,38 @@ EXPORT_SYMBOL(machine_real_restart);

#endif /* CONFIG_X86_32 */

+/*
+ * Apple MacBook5,2 (2009 MacBook) needs reboot=p
+ */
+static int __init set_pci_reboot(const struct dmi_system_id *d)
+{
+ if (reboot_type != BOOT_CF9) {
+ reboot_type = BOOT_CF9;
+ printk(KERN_INFO "%s series board detected. "
+ "Selecting PCI-method for reboots.\n", d->ident);
+ }
+ return 0;
+}
+
+static struct dmi_system_id __initdata pci_reboot_dmi_table[] = {
+ { /* Handle problems with rebooting on Apple MacBook5,2 */
+ .callback = set_pci_reboot,
+ .ident = "Apple MacBook",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MacBook5,2"),
+ },
+ },
+ { }
+};
+
+static int __init pci_reboot_init(void)
+{
+ dmi_check_system(pci_reboot_dmi_table);
+ return 0;
+}
+core_initcall(pci_reboot_init);
+
static inline void kb_wait(void)
{
int i;
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 59f31d2..78d185d 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -393,8 +393,8 @@ SECTIONS


#ifdef CONFIG_X86_32
-ASSERT((_end - LOAD_OFFSET <= KERNEL_IMAGE_SIZE),
- "kernel image bigger than KERNEL_IMAGE_SIZE")
+. = ASSERT((_end - LOAD_OFFSET <= KERNEL_IMAGE_SIZE),
+ "kernel image bigger than KERNEL_IMAGE_SIZE");
#else
/*
* Per-cpu symbols which need to be offset from __per_cpu_load
@@ -407,12 +407,12 @@ INIT_PER_CPU(irq_stack_union);
/*
* Build-time check on the image size:
*/
-ASSERT((_end - _text <= KERNEL_IMAGE_SIZE),
- "kernel image bigger than KERNEL_IMAGE_SIZE")
+. = ASSERT((_end - _text <= KERNEL_IMAGE_SIZE),
+ "kernel image bigger than KERNEL_IMAGE_SIZE");

#ifdef CONFIG_SMP
-ASSERT((per_cpu__irq_stack_union == 0),
- "irq_stack_union is not at start of per-cpu area");
+. = ASSERT((per_cpu__irq_stack_union == 0),
+ "irq_stack_union is not at start of per-cpu area");
#endif

#endif /* CONFIG_X86_32 */
@@ -420,7 +420,7 @@ ASSERT((per_cpu__irq_stack_union == 0),
#ifdef CONFIG_KEXEC
#include <asm/kexec.h>

-ASSERT(kexec_control_code_size <= KEXEC_CONTROL_CODE_MAX_SIZE,
- "kexec control code size is too big")
+. = ASSERT(kexec_control_code_size <= KEXEC_CONTROL_CODE_MAX_SIZE,
+ "kexec control code size is too big");
#endif

diff --git a/arch/x86/lib/msr.c b/arch/x86/lib/msr.c
index 1440b9c..caa24ac 100644
--- a/arch/x86/lib/msr.c
+++ b/arch/x86/lib/msr.c
@@ -89,16 +89,13 @@ void rdmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs)
rv.msrs = msrs;
rv.msr_no = msr_no;

- preempt_disable();
- /*
- * FIXME: handle the CPU we're executing on separately for now until
- * smp_call_function_many has been fixed to not skip it.
- */
- this_cpu = raw_smp_processor_id();
- smp_call_function_single(this_cpu, __rdmsr_on_cpu, &rv, 1);
+ this_cpu = get_cpu();
+
+ if (cpumask_test_cpu(this_cpu, mask))
+ __rdmsr_on_cpu(&rv);

smp_call_function_many(mask, __rdmsr_on_cpu, &rv, 1);
- preempt_enable();
+ put_cpu();
}
EXPORT_SYMBOL(rdmsr_on_cpus);

@@ -121,16 +118,13 @@ void wrmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs)
rv.msrs = msrs;
rv.msr_no = msr_no;

- preempt_disable();
- /*
- * FIXME: handle the CPU we're executing on separately for now until
- * smp_call_function_many has been fixed to not skip it.
- */
- this_cpu = raw_smp_processor_id();
- smp_call_function_single(this_cpu, __wrmsr_on_cpu, &rv, 1);
+ this_cpu = get_cpu();
+
+ if (cpumask_test_cpu(this_cpu, mask))
+ __wrmsr_on_cpu(&rv);

smp_call_function_many(mask, __wrmsr_on_cpu, &rv, 1);
- preempt_enable();
+ put_cpu();
}
EXPORT_SYMBOL(wrmsr_on_cpus);

diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 1b734d7..7e600c1 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -591,9 +591,12 @@ static int __change_page_attr(struct cpa_data *cpa, int primary)
unsigned int level;
pte_t *kpte, old_pte;

- if (cpa->flags & CPA_PAGES_ARRAY)
- address = (unsigned long)page_address(cpa->pages[cpa->curpage]);
- else if (cpa->flags & CPA_ARRAY)
+ if (cpa->flags & CPA_PAGES_ARRAY) {
+ struct page *page = cpa->pages[cpa->curpage];
+ if (unlikely(PageHighMem(page)))
+ return 0;
+ address = (unsigned long)page_address(page);
+ } else if (cpa->flags & CPA_ARRAY)
address = cpa->vaddr[cpa->curpage];
else
address = *cpa->vaddr;
@@ -697,9 +700,12 @@ static int cpa_process_alias(struct cpa_data *cpa)
* No need to redo, when the primary call touched the direct
* mapping already:
*/
- if (cpa->flags & CPA_PAGES_ARRAY)
- vaddr = (unsigned long)page_address(cpa->pages[cpa->curpage]);
- else if (cpa->flags & CPA_ARRAY)
+ if (cpa->flags & CPA_PAGES_ARRAY) {
+ struct page *page = cpa->pages[cpa->curpage];
+ if (unlikely(PageHighMem(page)))
+ return 0;
+ vaddr = (unsigned long)page_address(page);
+ } else if (cpa->flags & CPA_ARRAY)
vaddr = cpa->vaddr[cpa->curpage];
else
vaddr = *cpa->vaddr;
@@ -997,12 +1003,15 @@ EXPORT_SYMBOL(set_memory_array_uc);
int _set_memory_wc(unsigned long addr, int numpages)
{
int ret;
+ unsigned long addr_copy = addr;
+
ret = change_page_attr_set(&addr, numpages,
__pgprot(_PAGE_CACHE_UC_MINUS), 0);
-
if (!ret) {
- ret = change_page_attr_set(&addr, numpages,
- __pgprot(_PAGE_CACHE_WC), 0);
+ ret = change_page_attr_set_clr(&addr_copy, numpages,
+ __pgprot(_PAGE_CACHE_WC),
+ __pgprot(_PAGE_CACHE_MASK),
+ 0, 0, NULL);
}
return ret;
}
@@ -1119,7 +1128,9 @@ int set_pages_array_uc(struct page **pages, int addrinarray)
int free_idx;

for (i = 0; i < addrinarray; i++) {
- start = (unsigned long)page_address(pages[i]);
+ if (PageHighMem(pages[i]))
+ continue;
+ start = page_to_pfn(pages[i]) << PAGE_SHIFT;
end = start + PAGE_SIZE;
if (reserve_memtype(start, end, _PAGE_CACHE_UC_MINUS, NULL))
goto err_out;
@@ -1132,7 +1143,9 @@ int set_pages_array_uc(struct page **pages, int addrinarray)
err_out:
free_idx = i;
for (i = 0; i < free_idx; i++) {
- start = (unsigned long)page_address(pages[i]);
+ if (PageHighMem(pages[i]))
+ continue;
+ start = page_to_pfn(pages[i]) << PAGE_SHIFT;
end = start + PAGE_SIZE;
free_memtype(start, end);
}
@@ -1161,7 +1174,9 @@ int set_pages_array_wb(struct page **pages, int addrinarray)
return retval;

for (i = 0; i < addrinarray; i++) {
- start = (unsigned long)page_address(pages[i]);
+ if (PageHighMem(pages[i]))
+ continue;
+ start = page_to_pfn(pages[i]) << PAGE_SHIFT;
end = start + PAGE_SIZE;
free_memtype(start, end);
}
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index af8f965..ed34f5e 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -329,7 +329,6 @@ void __init reserve_top_address(unsigned long reserve)
printk(KERN_INFO "Reserving virtual address space above 0x%08x\n",
(int)-reserve);
__FIXADDR_TOP = -reserve - PAGE_SIZE;
- __VMALLOC_RESERVE += reserve;
#endif
}

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