[PATCH] Additions to .data.read_mostly section
Mark variables which are usually accessed for reads with __readmostly. Signed-off-by: Alok N Kataria <alokk@calsoftinc.com> Signed-off-by: Shai Fultheim <shai@scalex86.org> Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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13 changed files with 31 additions and 31 deletions
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@ -78,7 +78,7 @@ static struct irq_pin_list {
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int apic, pin, next;
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} irq_2_pin[PIN_MAP_SIZE];
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int vector_irq[NR_VECTORS] = { [0 ... NR_VECTORS - 1] = -1};
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int vector_irq[NR_VECTORS] __read_mostly = { [0 ... NR_VECTORS - 1] = -1};
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#ifdef CONFIG_PCI_MSI
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#define vector_to_irq(vector) \
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(platform_legacy_irq(vector) ? vector : vector_irq[vector])
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@ -1119,7 +1119,7 @@ static inline int IO_APIC_irq_trigger(int irq)
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}
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/* irq_vectors is indexed by the sum of all RTEs in all I/O APICs. */
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u8 irq_vector[NR_IRQ_VECTORS] = { FIRST_DEVICE_VECTOR , 0 };
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u8 irq_vector[NR_IRQ_VECTORS] __read_mostly = { FIRST_DEVICE_VECTOR , 0 };
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int assign_irq_vector(int irq)
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{
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@ -1990,7 +1990,7 @@ static void set_ioapic_affinity_vector (unsigned int vector,
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* edge-triggered handler, without risking IRQ storms and other ugly
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* races.
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*/
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static struct hw_interrupt_type ioapic_edge_type = {
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static struct hw_interrupt_type ioapic_edge_type __read_mostly = {
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.typename = "IO-APIC-edge",
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.startup = startup_edge_ioapic,
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.shutdown = shutdown_edge_ioapic,
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@ -2003,7 +2003,7 @@ static struct hw_interrupt_type ioapic_edge_type = {
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#endif
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};
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static struct hw_interrupt_type ioapic_level_type = {
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static struct hw_interrupt_type ioapic_level_type __read_mostly = {
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.typename = "IO-APIC-level",
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.startup = startup_level_ioapic,
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.shutdown = shutdown_level_ioapic,
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@ -2076,7 +2076,7 @@ static void ack_lapic_irq (unsigned int irq)
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static void end_lapic_irq (unsigned int i) { /* nothing */ }
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static struct hw_interrupt_type lapic_irq_type = {
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static struct hw_interrupt_type lapic_irq_type __read_mostly = {
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.typename = "local-APIC-edge",
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.startup = NULL, /* startup_irq() not used for IRQ0 */
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.shutdown = NULL, /* shutdown_irq() not used for IRQ0 */
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@ -19,7 +19,7 @@
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#include <asm/hpet.h>
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static unsigned long hpet_usec_quotient __read_mostly; /* convert hpet clks to usec */
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static unsigned long tsc_hpet_quotient; /* convert tsc to hpet clks */
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static unsigned long tsc_hpet_quotient __read_mostly; /* convert tsc to hpet clks */
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static unsigned long hpet_last; /* hpet counter value at last tick*/
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static unsigned long last_tsc_low; /* lsb 32 bits of Time Stamp Counter */
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static unsigned long last_tsc_high; /* msb 32 bits of Time Stamp Counter */
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@ -37,7 +37,7 @@
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#include <asm/mmzone.h>
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#include <bios_ebda.h>
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struct pglist_data *node_data[MAX_NUMNODES];
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struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
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EXPORT_SYMBOL(node_data);
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bootmem_data_t node0_bdata;
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@ -49,8 +49,8 @@ bootmem_data_t node0_bdata;
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* 2) node_start_pfn - the starting page frame number for a node
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* 3) node_end_pfn - the ending page fram number for a node
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*/
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unsigned long node_start_pfn[MAX_NUMNODES];
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unsigned long node_end_pfn[MAX_NUMNODES];
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unsigned long node_start_pfn[MAX_NUMNODES] __read_mostly;
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unsigned long node_end_pfn[MAX_NUMNODES] __read_mostly;
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#ifdef CONFIG_DISCONTIGMEM
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@ -66,7 +66,7 @@ unsigned long node_end_pfn[MAX_NUMNODES];
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* physnode_map[4-7] = 1;
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* physnode_map[8- ] = -1;
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*/
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s8 physnode_map[MAX_ELEMENTS] = { [0 ... (MAX_ELEMENTS - 1)] = -1};
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s8 physnode_map[MAX_ELEMENTS] __read_mostly = { [0 ... (MAX_ELEMENTS - 1)] = -1};
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EXPORT_SYMBOL(physnode_map);
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void memory_present(int nid, unsigned long start, unsigned long end)
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@ -393,7 +393,7 @@ void zap_low_mappings (void)
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}
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static int disable_nx __initdata = 0;
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u64 __supported_pte_mask = ~_PAGE_NX;
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u64 __supported_pte_mask __read_mostly = ~_PAGE_NX;
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/*
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* noexec = on|off
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@ -25,7 +25,7 @@
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#endif
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/* which logical CPU number maps to which CPU (physical APIC ID) */
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u8 x86_cpu_to_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
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u8 x86_cpu_to_apicid[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = BAD_APICID };
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EXPORT_SYMBOL(x86_cpu_to_apicid);
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u8 x86_cpu_to_log_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
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@ -70,7 +70,7 @@ static struct irq_pin_list {
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short apic, pin, next;
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} irq_2_pin[PIN_MAP_SIZE];
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int vector_irq[NR_VECTORS] = { [0 ... NR_VECTORS - 1] = -1};
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int vector_irq[NR_VECTORS] __read_mostly = { [0 ... NR_VECTORS - 1] = -1};
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#ifdef CONFIG_PCI_MSI
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#define vector_to_irq(vector) \
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(platform_legacy_irq(vector) ? vector : vector_irq[vector])
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@ -683,7 +683,7 @@ static inline int IO_APIC_irq_trigger(int irq)
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}
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/* irq_vectors is indexed by the sum of all RTEs in all I/O APICs. */
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u8 irq_vector[NR_IRQ_VECTORS] = { FIRST_DEVICE_VECTOR , 0 };
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u8 irq_vector[NR_IRQ_VECTORS] __read_mostly = { FIRST_DEVICE_VECTOR , 0 };
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int assign_irq_vector(int irq)
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{
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@ -1443,7 +1443,7 @@ static void set_ioapic_affinity_vector (unsigned int vector,
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* races.
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*/
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static struct hw_interrupt_type ioapic_edge_type = {
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static struct hw_interrupt_type ioapic_edge_type __read_mostly = {
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.typename = "IO-APIC-edge",
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.startup = startup_edge_ioapic,
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.shutdown = shutdown_edge_ioapic,
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@ -1456,7 +1456,7 @@ static struct hw_interrupt_type ioapic_edge_type = {
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#endif
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};
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static struct hw_interrupt_type ioapic_level_type = {
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static struct hw_interrupt_type ioapic_level_type __read_mostly = {
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.typename = "IO-APIC-level",
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.startup = startup_level_ioapic,
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.shutdown = shutdown_level_ioapic,
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@ -1529,7 +1529,7 @@ static void ack_lapic_irq (unsigned int irq)
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static void end_lapic_irq (unsigned int i) { /* nothing */ }
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static struct hw_interrupt_type lapic_irq_type = {
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static struct hw_interrupt_type lapic_irq_type __read_mostly = {
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.typename = "local-APIC-edge",
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.startup = NULL, /* startup_irq() not used for IRQ0 */
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.shutdown = NULL, /* shutdown_irq() not used for IRQ0 */
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@ -65,7 +65,7 @@
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* Machine setup..
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*/
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struct cpuinfo_x86 boot_cpu_data;
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struct cpuinfo_x86 boot_cpu_data __read_mostly;
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unsigned long mmu_cr4_features;
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@ -36,7 +36,7 @@ struct desc_ptr idt_descr = { 256 * 16, (unsigned long) idt_table };
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char boot_cpu_stack[IRQSTACKSIZE] __attribute__((section(".bss.page_aligned")));
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unsigned long __supported_pte_mask = ~0UL;
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unsigned long __supported_pte_mask __read_mostly = ~0UL;
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static int do_not_nx __initdata = 0;
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/* noexec=on|off
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@ -62,13 +62,13 @@
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/* Number of siblings per CPU package */
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int smp_num_siblings = 1;
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/* Package ID of each logical CPU */
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u8 phys_proc_id[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
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u8 cpu_core_id[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID };
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u8 phys_proc_id[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = BAD_APICID };
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u8 cpu_core_id[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = BAD_APICID };
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EXPORT_SYMBOL(phys_proc_id);
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EXPORT_SYMBOL(cpu_core_id);
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/* Bitmask of currently online CPUs */
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cpumask_t cpu_online_map;
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cpumask_t cpu_online_map __read_mostly;
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EXPORT_SYMBOL(cpu_online_map);
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@ -88,8 +88,8 @@ struct cpuinfo_x86 cpu_data[NR_CPUS] __cacheline_aligned;
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/* Set when the idlers are all forked */
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int smp_threads_ready;
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cpumask_t cpu_sibling_map[NR_CPUS] __cacheline_aligned;
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cpumask_t cpu_core_map[NR_CPUS] __cacheline_aligned;
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cpumask_t cpu_sibling_map[NR_CPUS] __read_mostly;
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cpumask_t cpu_core_map[NR_CPUS] __read_mostly;
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EXPORT_SYMBOL(cpu_core_map);
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/*
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@ -22,14 +22,14 @@
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#define Dprintk(x...)
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#endif
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struct pglist_data *node_data[MAX_NUMNODES];
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struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
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bootmem_data_t plat_node_bdata[MAX_NUMNODES];
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int memnode_shift;
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u8 memnodemap[NODEMAPSIZE];
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unsigned char cpu_to_node[NR_CPUS] = { [0 ... NR_CPUS-1] = NUMA_NO_NODE };
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cpumask_t node_to_cpumask[MAX_NUMNODES];
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unsigned char cpu_to_node[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = NUMA_NO_NODE };
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cpumask_t node_to_cpumask[MAX_NUMNODES] __read_mostly;
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int numa_off __initdata;
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@ -40,7 +40,7 @@ static inline int sysfs_init(void)
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__cacheline_aligned_in_smp DEFINE_SPINLOCK(vfsmount_lock);
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static struct list_head *mount_hashtable;
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static int hash_mask, hash_bits;
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static int hash_mask __read_mostly, hash_bits __read_mostly;
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static kmem_cache_t *mnt_cache;
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static inline unsigned long hash(struct vfsmount *mnt, struct dentry *dentry)
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@ -47,8 +47,8 @@ EXPORT_SYMBOL(node_online_map);
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nodemask_t node_possible_map __read_mostly = NODE_MASK_ALL;
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EXPORT_SYMBOL(node_possible_map);
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struct pglist_data *pgdat_list __read_mostly;
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unsigned long totalram_pages;
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unsigned long totalhigh_pages;
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unsigned long totalram_pages __read_mostly;
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unsigned long totalhigh_pages __read_mostly;
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long nr_swap_pages;
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/*
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@ -180,7 +180,7 @@ static struct inode_operations shmem_inode_operations;
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static struct inode_operations shmem_dir_inode_operations;
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static struct vm_operations_struct shmem_vm_ops;
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static struct backing_dev_info shmem_backing_dev_info = {
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static struct backing_dev_info shmem_backing_dev_info __read_mostly = {
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.ra_pages = 0, /* No readahead */
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.capabilities = BDI_CAP_NO_ACCT_DIRTY | BDI_CAP_NO_WRITEBACK,
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.unplug_io_fn = default_unplug_io_fn,
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