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Date: Sat, 20 Dec 2014 18:07:02 +0100
From: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To: Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghua.yu@...el.com>
Cc: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
Thomas Gleixner <tglx@...utronix.de>,
Grant Likely <grant.likely@...aro.org>,
Christoph Lameter <cl@...ux.com>, Tejun Heo <tj@...nel.org>,
Michael Opdenacker <michael.opdenacker@...e-electrons.com>,
linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arch: ia64: kernel: irq_ia64.c: Remove unused function
Remove the function ia64_handle_irq() that is not used anywhere.
This was partially found by using a static code analysis program called cppcheck.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
arch/ia64/kernel/irq_ia64.c | 83 -------------------------------------------
1 file changed, 83 deletions(-)
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index 698d8fe..1b64f10 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -432,89 +432,6 @@ void destroy_irq(unsigned int irq)
# define IS_RESCHEDULE(vec) (0)
# define IS_LOCAL_TLB_FLUSH(vec) (0)
#endif
-/*
- * That's where the IVT branches when we get an external
- * interrupt. This branches to the correct hardware IRQ handler via
- * function ptr.
- */
-void
-ia64_handle_irq (ia64_vector vector, struct pt_regs *regs)
-{
- struct pt_regs *old_regs = set_irq_regs(regs);
- unsigned long saved_tpr;
-
-#if IRQ_DEBUG
- {
- unsigned long bsp, sp;
-
- /*
- * Note: if the interrupt happened while executing in
- * the context switch routine (ia64_switch_to), we may
- * get a spurious stack overflow here. This is
- * because the register and the memory stack are not
- * switched atomically.
- */
- bsp = ia64_getreg(_IA64_REG_AR_BSP);
- sp = ia64_getreg(_IA64_REG_SP);
-
- if ((sp - bsp) < 1024) {
- static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 5);
-
- if (__ratelimit(&ratelimit)) {
- printk("ia64_handle_irq: DANGER: less than "
- "1KB of free stack space!!\n"
- "(bsp=0x%lx, sp=%lx)\n", bsp, sp);
- }
- }
- }
-#endif /* IRQ_DEBUG */
-
- /*
- * Always set TPR to limit maximum interrupt nesting depth to
- * 16 (without this, it would be ~240, which could easily lead
- * to kernel stack overflows).
- */
- irq_enter();
- saved_tpr = ia64_getreg(_IA64_REG_CR_TPR);
- ia64_srlz_d();
- while (vector != IA64_SPURIOUS_INT_VECTOR) {
- int irq = local_vector_to_irq(vector);
-
- if (unlikely(IS_LOCAL_TLB_FLUSH(vector))) {
- smp_local_flush_tlb();
- kstat_incr_irq_this_cpu(irq);
- } else if (unlikely(IS_RESCHEDULE(vector))) {
- scheduler_ipi();
- kstat_incr_irq_this_cpu(irq);
- } else {
- ia64_setreg(_IA64_REG_CR_TPR, vector);
- ia64_srlz_d();
-
- if (unlikely(irq < 0)) {
- printk(KERN_ERR "%s: Unexpected interrupt "
- "vector %d on CPU %d is not mapped "
- "to any IRQ!\n", __func__, vector,
- smp_processor_id());
- } else
- generic_handle_irq(irq);
-
- /*
- * Disable interrupts and send EOI:
- */
- local_irq_disable();
- ia64_setreg(_IA64_REG_CR_TPR, saved_tpr);
- }
- ia64_eoi();
- vector = ia64_get_ivr();
- }
- /*
- * This must be done *after* the ia64_eoi(). For example, the keyboard softirq
- * handler needs to be able to wait for further keyboard interrupts, which can't
- * come through until ia64_eoi() has been done.
- */
- irq_exit();
- set_irq_regs(old_regs);
-}
#ifdef CONFIG_HOTPLUG_CPU
/*
--
1.7.10.4
--
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