ia64: Replace __get_cpu_var uses
__get_cpu_var() is used for multiple purposes in the kernel source. One of them is address calculation via the form &__get_cpu_var(x). This calculates the address for the instance of the percpu variable of the current processor based on an offset. Other use cases are for storing and retrieving data from the current processors percpu area. __get_cpu_var() can be used as an lvalue when writing data or on the right side of an assignment. __get_cpu_var() is defined as : #define __get_cpu_var(var) (*this_cpu_ptr(&(var))) __get_cpu_var() always only does an address determination. However, store and retrieve operations could use a segment prefix (or global register on other platforms) to avoid the address calculation. this_cpu_write() and this_cpu_read() can directly take an offset into a percpu area and use optimized assembly code to read and write per cpu variables. This patch converts __get_cpu_var into either an explicit address calculation using this_cpu_ptr() or into a use of this_cpu operations that use the offset. Thereby address calculations are avoided and less registers are used when code is generated. At the end of the patch set all uses of __get_cpu_var have been removed so the macro is removed too. The patch set includes passes over all arches as well. Once these operations are used throughout then specialized macros can be defined in non -x86 arches as well in order to optimize per cpu access by f.e. using a global register that may be set to the per cpu base. Transformations done to __get_cpu_var() 1. Determine the address of the percpu instance of the current processor. DEFINE_PER_CPU(int, y); int *x = &__get_cpu_var(y); Converts to int *x = this_cpu_ptr(&y); 2. Same as #1 but this time an array structure is involved. DEFINE_PER_CPU(int, y[20]); int *x = __get_cpu_var(y); Converts to int *x = this_cpu_ptr(y); 3. Retrieve the content of the current processors instance of a per cpu variable. DEFINE_PER_CPU(int, y); int x = __get_cpu_var(y) Converts to int x = __this_cpu_read(y); 4. Retrieve the content of a percpu struct DEFINE_PER_CPU(struct mystruct, y); struct mystruct x = __get_cpu_var(y); Converts to memcpy(&x, this_cpu_ptr(&y), sizeof(x)); 5. Assignment to a per cpu variable DEFINE_PER_CPU(int, y) __get_cpu_var(y) = x; Converts to __this_cpu_write(y, x); 6. Increment/Decrement etc of a per cpu variable DEFINE_PER_CPU(int, y); __get_cpu_var(y)++ Converts to __this_cpu_inc(y) Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: linux-ia64@vger.kernel.org Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Tejun Heo <tj@kernel.org>
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@ -159,7 +159,7 @@ static inline ia64_vector __ia64_irq_to_vector(int irq)
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static inline unsigned int
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static inline unsigned int
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__ia64_local_vector_to_irq (ia64_vector vec)
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__ia64_local_vector_to_irq (ia64_vector vec)
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{
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{
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return __get_cpu_var(vector_irq)[vec];
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return __this_cpu_read(vector_irq[vec]);
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}
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}
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#endif
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#endif
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@ -57,7 +57,7 @@ struct sn_hub_info_s {
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u16 nasid_bitmask;
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u16 nasid_bitmask;
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};
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};
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DECLARE_PER_CPU(struct sn_hub_info_s, __sn_hub_info);
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DECLARE_PER_CPU(struct sn_hub_info_s, __sn_hub_info);
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#define sn_hub_info (&__get_cpu_var(__sn_hub_info))
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#define sn_hub_info this_cpu_ptr(&__sn_hub_info)
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#define is_shub2() (sn_hub_info->shub2)
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#define is_shub2() (sn_hub_info->shub2)
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#define is_shub1() (sn_hub_info->shub2 == 0)
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#define is_shub1() (sn_hub_info->shub2 == 0)
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@ -72,7 +72,7 @@ DECLARE_PER_CPU(struct sn_hub_info_s, __sn_hub_info);
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* cpu.
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* cpu.
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*/
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*/
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DECLARE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_COMPACT_NODES]);
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DECLARE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_COMPACT_NODES]);
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#define sn_cnodeid_to_nasid (&__get_cpu_var(__sn_cnodeid_to_nasid[0]))
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#define sn_cnodeid_to_nasid this_cpu_ptr(&__sn_cnodeid_to_nasid[0])
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extern u8 sn_partition_id;
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extern u8 sn_partition_id;
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@ -70,7 +70,7 @@ typedef struct nodepda_s nodepda_t;
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*/
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*/
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DECLARE_PER_CPU(struct nodepda_s *, __sn_nodepda);
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DECLARE_PER_CPU(struct nodepda_s *, __sn_nodepda);
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#define sn_nodepda (__get_cpu_var(__sn_nodepda))
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#define sn_nodepda __this_cpu_read(__sn_nodepda)
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#define NODEPDA(cnodeid) (sn_nodepda->pernode_pdaindr[cnodeid])
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#define NODEPDA(cnodeid) (sn_nodepda->pernode_pdaindr[cnodeid])
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/*
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/*
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@ -32,7 +32,7 @@ extern void ia64_load_extra (struct task_struct *task);
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#ifdef CONFIG_PERFMON
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#ifdef CONFIG_PERFMON
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DECLARE_PER_CPU(unsigned long, pfm_syst_info);
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DECLARE_PER_CPU(unsigned long, pfm_syst_info);
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# define PERFMON_IS_SYSWIDE() (__get_cpu_var(pfm_syst_info) & 0x1)
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# define PERFMON_IS_SYSWIDE() (__this_cpu_read(pfm_syst_info) & 0x1)
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#else
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#else
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# define PERFMON_IS_SYSWIDE() (0)
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# define PERFMON_IS_SYSWIDE() (0)
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#endif
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#endif
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@ -108,7 +108,7 @@ struct uv_hub_info_s {
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unsigned char n_val;
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unsigned char n_val;
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};
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};
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DECLARE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
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DECLARE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
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#define uv_hub_info (&__get_cpu_var(__uv_hub_info))
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#define uv_hub_info this_cpu_ptr(&__uv_hub_info)
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#define uv_cpu_hub_info(cpu) (&per_cpu(__uv_hub_info, cpu))
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#define uv_cpu_hub_info(cpu) (&per_cpu(__uv_hub_info, cpu))
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/*
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/*
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@ -42,7 +42,7 @@ ia64_vector __ia64_irq_to_vector(int irq)
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unsigned int __ia64_local_vector_to_irq (ia64_vector vec)
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unsigned int __ia64_local_vector_to_irq (ia64_vector vec)
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{
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{
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return __get_cpu_var(vector_irq)[vec];
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return __this_cpu_read(vector_irq[vec]);
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}
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}
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#endif
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#endif
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@ -330,7 +330,7 @@ static irqreturn_t smp_irq_move_cleanup_interrupt(int irq, void *dev_id)
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int irq;
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int irq;
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struct irq_desc *desc;
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struct irq_desc *desc;
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struct irq_cfg *cfg;
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struct irq_cfg *cfg;
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irq = __get_cpu_var(vector_irq)[vector];
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irq = __this_cpu_read(vector_irq[vector]);
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if (irq < 0)
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if (irq < 0)
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continue;
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continue;
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@ -344,7 +344,7 @@ static irqreturn_t smp_irq_move_cleanup_interrupt(int irq, void *dev_id)
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goto unlock;
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goto unlock;
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spin_lock_irqsave(&vector_lock, flags);
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spin_lock_irqsave(&vector_lock, flags);
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__get_cpu_var(vector_irq)[vector] = -1;
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__this_cpu_write(vector_irq[vector], -1);
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cpu_clear(me, vector_table[vector]);
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cpu_clear(me, vector_table[vector]);
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spin_unlock_irqrestore(&vector_lock, flags);
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spin_unlock_irqrestore(&vector_lock, flags);
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cfg->move_cleanup_count--;
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cfg->move_cleanup_count--;
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@ -396,7 +396,7 @@ static void __kprobes restore_previous_kprobe(struct kprobe_ctlblk *kcb)
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{
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{
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unsigned int i;
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unsigned int i;
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i = atomic_read(&kcb->prev_kprobe_index);
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i = atomic_read(&kcb->prev_kprobe_index);
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__get_cpu_var(current_kprobe) = kcb->prev_kprobe[i-1].kp;
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__this_cpu_write(current_kprobe, kcb->prev_kprobe[i-1].kp);
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kcb->kprobe_status = kcb->prev_kprobe[i-1].status;
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kcb->kprobe_status = kcb->prev_kprobe[i-1].status;
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atomic_sub(1, &kcb->prev_kprobe_index);
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atomic_sub(1, &kcb->prev_kprobe_index);
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}
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}
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@ -404,7 +404,7 @@ static void __kprobes restore_previous_kprobe(struct kprobe_ctlblk *kcb)
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static void __kprobes set_current_kprobe(struct kprobe *p,
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static void __kprobes set_current_kprobe(struct kprobe *p,
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struct kprobe_ctlblk *kcb)
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struct kprobe_ctlblk *kcb)
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{
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{
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__get_cpu_var(current_kprobe) = p;
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__this_cpu_write(current_kprobe, p);
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}
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}
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static void kretprobe_trampoline(void)
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static void kretprobe_trampoline(void)
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@ -823,7 +823,7 @@ static int __kprobes pre_kprobes_handler(struct die_args *args)
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/*
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/*
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* jprobe instrumented function just completed
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* jprobe instrumented function just completed
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*/
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*/
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p = __get_cpu_var(current_kprobe);
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p = __this_cpu_read(current_kprobe);
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if (p->break_handler && p->break_handler(p, regs)) {
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if (p->break_handler && p->break_handler(p, regs)) {
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goto ss_probe;
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goto ss_probe;
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}
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}
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@ -1341,7 +1341,7 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
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ia64_mlogbuf_finish(1);
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ia64_mlogbuf_finish(1);
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}
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}
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if (__get_cpu_var(ia64_mca_tr_reload)) {
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if (__this_cpu_read(ia64_mca_tr_reload)) {
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mca_insert_tr(0x1); /*Reload dynamic itrs*/
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mca_insert_tr(0x1); /*Reload dynamic itrs*/
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mca_insert_tr(0x2); /*Reload dynamic itrs*/
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mca_insert_tr(0x2); /*Reload dynamic itrs*/
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}
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}
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@ -1868,14 +1868,14 @@ ia64_mca_cpu_init(void *cpu_data)
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"MCA", cpu);
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"MCA", cpu);
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format_mca_init_stack(data, offsetof(struct ia64_mca_cpu, init_stack),
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format_mca_init_stack(data, offsetof(struct ia64_mca_cpu, init_stack),
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"INIT", cpu);
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"INIT", cpu);
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__get_cpu_var(ia64_mca_data) = __per_cpu_mca[cpu] = __pa(data);
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__this_cpu_write(ia64_mca_data, (__per_cpu_mca[cpu] = __pa(data)));
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/*
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/*
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* Stash away a copy of the PTE needed to map the per-CPU page.
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* Stash away a copy of the PTE needed to map the per-CPU page.
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* We may need it during MCA recovery.
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* We may need it during MCA recovery.
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*/
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*/
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__get_cpu_var(ia64_mca_per_cpu_pte) =
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__this_cpu_write(ia64_mca_per_cpu_pte,
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pte_val(mk_pte_phys(__pa(cpu_data), PAGE_KERNEL));
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pte_val(mk_pte_phys(__pa(cpu_data), PAGE_KERNEL)));
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/*
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/*
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* Also, stash away a copy of the PAL address and the PTE
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* Also, stash away a copy of the PAL address and the PTE
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@ -1884,10 +1884,10 @@ ia64_mca_cpu_init(void *cpu_data)
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pal_vaddr = efi_get_pal_addr();
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pal_vaddr = efi_get_pal_addr();
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if (!pal_vaddr)
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if (!pal_vaddr)
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return;
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return;
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__get_cpu_var(ia64_mca_pal_base) =
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__this_cpu_write(ia64_mca_pal_base,
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GRANULEROUNDDOWN((unsigned long) pal_vaddr);
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GRANULEROUNDDOWN((unsigned long) pal_vaddr));
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__get_cpu_var(ia64_mca_pal_pte) = pte_val(mk_pte_phys(__pa(pal_vaddr),
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__this_cpu_write(ia64_mca_pal_pte, pte_val(mk_pte_phys(__pa(pal_vaddr),
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PAGE_KERNEL));
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PAGE_KERNEL)));
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}
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}
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static void ia64_mca_cmc_vector_adjust(void *dummy)
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static void ia64_mca_cmc_vector_adjust(void *dummy)
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@ -215,7 +215,7 @@ static inline void play_dead(void)
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unsigned int this_cpu = smp_processor_id();
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unsigned int this_cpu = smp_processor_id();
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/* Ack it */
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/* Ack it */
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__get_cpu_var(cpu_state) = CPU_DEAD;
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__this_cpu_write(cpu_state, CPU_DEAD);
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max_xtp();
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max_xtp();
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local_irq_disable();
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local_irq_disable();
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@ -273,7 +273,7 @@ ia64_save_extra (struct task_struct *task)
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if ((task->thread.flags & IA64_THREAD_PM_VALID) != 0)
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if ((task->thread.flags & IA64_THREAD_PM_VALID) != 0)
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pfm_save_regs(task);
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pfm_save_regs(task);
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info = __get_cpu_var(pfm_syst_info);
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info = __this_cpu_read(pfm_syst_info);
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if (info & PFM_CPUINFO_SYST_WIDE)
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if (info & PFM_CPUINFO_SYST_WIDE)
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pfm_syst_wide_update_task(task, info, 0);
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pfm_syst_wide_update_task(task, info, 0);
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#endif
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#endif
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@ -293,7 +293,7 @@ ia64_load_extra (struct task_struct *task)
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if ((task->thread.flags & IA64_THREAD_PM_VALID) != 0)
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if ((task->thread.flags & IA64_THREAD_PM_VALID) != 0)
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pfm_load_regs(task);
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pfm_load_regs(task);
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info = __get_cpu_var(pfm_syst_info);
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info = __this_cpu_read(pfm_syst_info);
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if (info & PFM_CPUINFO_SYST_WIDE)
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if (info & PFM_CPUINFO_SYST_WIDE)
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pfm_syst_wide_update_task(task, info, 1);
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pfm_syst_wide_update_task(task, info, 1);
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#endif
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#endif
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@ -299,7 +299,7 @@ handle_fpu_swa (int fp_fault, struct pt_regs *regs, unsigned long isr)
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if (!(current->thread.flags & IA64_THREAD_FPEMU_NOPRINT)) {
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if (!(current->thread.flags & IA64_THREAD_FPEMU_NOPRINT)) {
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unsigned long count, current_jiffies = jiffies;
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unsigned long count, current_jiffies = jiffies;
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struct fpu_swa_msg *cp = &__get_cpu_var(cpulast);
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struct fpu_swa_msg *cp = this_cpu_ptr(&cpulast);
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if (unlikely(current_jiffies > cp->time))
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if (unlikely(current_jiffies > cp->time))
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cp->count = 0;
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cp->count = 0;
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@ -134,8 +134,8 @@ sn2_ipi_flush_all_tlb(struct mm_struct *mm)
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itc = ia64_get_itc();
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itc = ia64_get_itc();
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smp_flush_tlb_cpumask(*mm_cpumask(mm));
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smp_flush_tlb_cpumask(*mm_cpumask(mm));
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itc = ia64_get_itc() - itc;
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itc = ia64_get_itc() - itc;
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__get_cpu_var(ptcstats).shub_ipi_flushes_itc_clocks += itc;
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__this_cpu_add(ptcstats.shub_ipi_flushes_itc_clocks, itc);
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__get_cpu_var(ptcstats).shub_ipi_flushes++;
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__this_cpu_inc(ptcstats.shub_ipi_flushes);
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}
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}
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/**
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/**
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@ -199,14 +199,14 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
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start += (1UL << nbits);
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start += (1UL << nbits);
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} while (start < end);
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} while (start < end);
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ia64_srlz_i();
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ia64_srlz_i();
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__get_cpu_var(ptcstats).ptc_l++;
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__this_cpu_inc(ptcstats.ptc_l);
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preempt_enable();
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preempt_enable();
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return;
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return;
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}
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}
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if (atomic_read(&mm->mm_users) == 1 && mymm) {
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if (atomic_read(&mm->mm_users) == 1 && mymm) {
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flush_tlb_mm(mm);
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flush_tlb_mm(mm);
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__get_cpu_var(ptcstats).change_rid++;
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__this_cpu_inc(ptcstats.change_rid);
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preempt_enable();
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preempt_enable();
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return;
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return;
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}
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}
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@ -250,11 +250,11 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
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spin_lock_irqsave(PTC_LOCK(shub1), flags);
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spin_lock_irqsave(PTC_LOCK(shub1), flags);
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itc2 = ia64_get_itc();
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itc2 = ia64_get_itc();
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__get_cpu_var(ptcstats).lock_itc_clocks += itc2 - itc;
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__this_cpu_add(ptcstats.lock_itc_clocks, itc2 - itc);
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__get_cpu_var(ptcstats).shub_ptc_flushes++;
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__this_cpu_inc(ptcstats.shub_ptc_flushes);
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__get_cpu_var(ptcstats).nodes_flushed += nix;
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__this_cpu_add(ptcstats.nodes_flushed, nix);
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if (!mymm)
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if (!mymm)
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__get_cpu_var(ptcstats).shub_ptc_flushes_not_my_mm++;
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__this_cpu_inc(ptcstats.shub_ptc_flushes_not_my_mm);
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if (use_cpu_ptcga && !mymm) {
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if (use_cpu_ptcga && !mymm) {
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old_rr = ia64_get_rr(start);
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old_rr = ia64_get_rr(start);
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@ -299,9 +299,9 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
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done:
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done:
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itc2 = ia64_get_itc() - itc2;
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itc2 = ia64_get_itc() - itc2;
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__get_cpu_var(ptcstats).shub_itc_clocks += itc2;
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__this_cpu_add(ptcstats.shub_itc_clocks, itc2);
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if (itc2 > __get_cpu_var(ptcstats).shub_itc_clocks_max)
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if (itc2 > __this_cpu_read(ptcstats.shub_itc_clocks_max))
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__get_cpu_var(ptcstats).shub_itc_clocks_max = itc2;
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__this_cpu_write(ptcstats.shub_itc_clocks_max, itc2);
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if (old_rr) {
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if (old_rr) {
|
||||||
ia64_set_rr(start, old_rr);
|
ia64_set_rr(start, old_rr);
|
||||||
|
@ -311,7 +311,7 @@ done:
|
||||||
spin_unlock_irqrestore(PTC_LOCK(shub1), flags);
|
spin_unlock_irqrestore(PTC_LOCK(shub1), flags);
|
||||||
|
|
||||||
if (flush_opt == 1 && deadlock) {
|
if (flush_opt == 1 && deadlock) {
|
||||||
__get_cpu_var(ptcstats).deadlocks++;
|
__this_cpu_inc(ptcstats.deadlocks);
|
||||||
sn2_ipi_flush_all_tlb(mm);
|
sn2_ipi_flush_all_tlb(mm);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -334,7 +334,7 @@ sn2_ptc_deadlock_recovery(short *nasids, short ib, short ie, int mynasid,
|
||||||
short nasid, i;
|
short nasid, i;
|
||||||
unsigned long *piows, zeroval, n;
|
unsigned long *piows, zeroval, n;
|
||||||
|
|
||||||
__get_cpu_var(ptcstats).deadlocks++;
|
__this_cpu_inc(ptcstats.deadlocks);
|
||||||
|
|
||||||
piows = (unsigned long *) pda->pio_write_status_addr;
|
piows = (unsigned long *) pda->pio_write_status_addr;
|
||||||
zeroval = pda->pio_write_status_val;
|
zeroval = pda->pio_write_status_val;
|
||||||
|
@ -349,7 +349,7 @@ sn2_ptc_deadlock_recovery(short *nasids, short ib, short ie, int mynasid,
|
||||||
ptc1 = CHANGE_NASID(nasid, ptc1);
|
ptc1 = CHANGE_NASID(nasid, ptc1);
|
||||||
|
|
||||||
n = sn2_ptc_deadlock_recovery_core(ptc0, data0, ptc1, data1, piows, zeroval);
|
n = sn2_ptc_deadlock_recovery_core(ptc0, data0, ptc1, data1, piows, zeroval);
|
||||||
__get_cpu_var(ptcstats).deadlocks2 += n;
|
__this_cpu_add(ptcstats.deadlocks2, n);
|
||||||
}
|
}
|
||||||
|
|
||||||
}
|
}
|
||||||
|
|
Loading…
Reference in New Issue