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Message-Id: <20200304004936.4955-1-afzal.mohd.ma@gmail.com>
Date: Wed, 4 Mar 2020 06:19:36 +0530
From: afzal mohammed <afzal.mohd.ma@...il.com>
To: linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: afzal mohammed <afzal.mohd.ma@...il.com>,
Tony Luck <tony.luck@...el.com>,
Fenghua Yu <fenghua.yu@...el.com>
Subject: [PATCH v3] ia64: replace setup_irq() by request_irq()
request_irq() is preferred over setup_irq(). Invocations of setup_irq()
occur after memory allocators are ready.
Per tglx[1], setup_irq() existed in olden days when allocators were not
ready by the time early interrupts were initialized.
Hence replace setup_irq() by request_irq().
[1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos
Signed-off-by: afzal mohammed <afzal.mohd.ma@...il.com>
---
Hi ia64 maintainers,
if okay w/ this change, please consider taking it thr' your tree, else please
let me know.
Regards
afzal
Link to v2 & v1,
[v2] https://lkml.kernel.org/r/cover.1582471508.git.afzal.mohd.ma@gmail.com
[v1] https://lkml.kernel.org/r/cover.1581478323.git.afzal.mohd.ma@gmail.com
v3:
* Split out from tree wide series, as Thomas suggested to get it thr'
respective maintainers
* Modify pr_err displayed in case of error
* Re-arrange code & choose pr_err args as required to improve readability
* Remove irrelevant parts from commit message & improve
v2:
* Replace pr_err("request_irq() on %s failed" by
pr_err("%s: request_irq() failed"
* Commit message massage
arch/ia64/kernel/irq_ia64.c | 42 +++++++++++--------------------
arch/ia64/kernel/mca.c | 49 ++++++++++---------------------------
2 files changed, 27 insertions(+), 64 deletions(-)
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index 8e91c86e8072..8bde6e350acb 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -351,11 +351,6 @@ static irqreturn_t smp_irq_move_cleanup_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static struct irqaction irq_move_irqaction = {
- .handler = smp_irq_move_cleanup_interrupt,
- .name = "irq_move"
-};
-
static int __init parse_vector_domain(char *arg)
{
if (!arg)
@@ -586,28 +581,15 @@ static irqreturn_t dummy_handler (int irq, void *dev_id)
return IRQ_NONE;
}
-static struct irqaction ipi_irqaction = {
- .handler = handle_IPI,
- .name = "IPI"
-};
-
/*
* KVM uses this interrupt to force a cpu out of guest mode
*/
-static struct irqaction resched_irqaction = {
- .handler = dummy_handler,
- .name = "resched"
-};
-
-static struct irqaction tlb_irqaction = {
- .handler = dummy_handler,
- .name = "tlb_flush"
-};
#endif
void
-ia64_native_register_percpu_irq (ia64_vector vec, struct irqaction *action)
+ia64_native_register_percpu_irq(ia64_vector vec, const char *name,
+ irq_handler_t handler)
{
unsigned int irq;
@@ -615,8 +597,9 @@ ia64_native_register_percpu_irq (ia64_vector vec, struct irqaction *action)
BUG_ON(bind_irq_vector(irq, vec, CPU_MASK_ALL));
irq_set_status_flags(irq, IRQ_PER_CPU);
irq_set_chip(irq, &irq_type_ia64_lsapic);
- if (action)
- setup_irq(irq, action);
+ if (handler)
+ if (request_irq(irq, handler, 0, name, NULL))
+ pr_err("Failed to request irq %u (%s)\n", irq, name);
irq_set_handler(irq, handle_percpu_irq);
}
@@ -624,9 +607,10 @@ void __init
ia64_native_register_ipi(void)
{
#ifdef CONFIG_SMP
- register_percpu_irq(IA64_IPI_VECTOR, &ipi_irqaction);
- register_percpu_irq(IA64_IPI_RESCHEDULE, &resched_irqaction);
- register_percpu_irq(IA64_IPI_LOCAL_TLB_FLUSH, &tlb_irqaction);
+ register_percpu_irq(IA64_IPI_VECTOR, "IPI", handle_IPI);
+ register_percpu_irq(IA64_IPI_RESCHEDULE, "resched", dummy_handler);
+ register_percpu_irq(IA64_IPI_LOCAL_TLB_FLUSH, "tlb_flush",
+ dummy_handler);
#endif
}
@@ -635,10 +619,12 @@ init_IRQ (void)
{
acpi_boot_init();
ia64_register_ipi();
- register_percpu_irq(IA64_SPURIOUS_INT_VECTOR, NULL);
+ register_percpu_irq(IA64_SPURIOUS_INT_VECTOR, NULL, NULL);
#ifdef CONFIG_SMP
- if (vector_domain_type != VECTOR_DOMAIN_NONE)
- register_percpu_irq(IA64_IRQ_MOVE_VECTOR, &irq_move_irqaction);
+ if (vector_domain_type != VECTOR_DOMAIN_NONE) {
+ register_percpu_irq(IA64_IRQ_MOVE_VECTOR, "irq_move",
+ smp_irq_move_cleanup_interrupt);
+ }
#endif
#ifdef CONFIG_PERFMON
pfm_init_percpu();
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index bf2cb9294795..fc74b0251570 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -1766,36 +1766,6 @@ ia64_mca_disable_cpe_polling(char *str)
__setup("disable_cpe_poll", ia64_mca_disable_cpe_polling);
-static struct irqaction cmci_irqaction = {
- .handler = ia64_mca_cmc_int_handler,
- .name = "cmc_hndlr"
-};
-
-static struct irqaction cmcp_irqaction = {
- .handler = ia64_mca_cmc_int_caller,
- .name = "cmc_poll"
-};
-
-static struct irqaction mca_rdzv_irqaction = {
- .handler = ia64_mca_rendez_int_handler,
- .name = "mca_rdzv"
-};
-
-static struct irqaction mca_wkup_irqaction = {
- .handler = ia64_mca_wakeup_int_handler,
- .name = "mca_wkup"
-};
-
-static struct irqaction mca_cpe_irqaction = {
- .handler = ia64_mca_cpe_int_handler,
- .name = "cpe_hndlr"
-};
-
-static struct irqaction mca_cpep_irqaction = {
- .handler = ia64_mca_cpe_int_caller,
- .name = "cpe_poll"
-};
-
/* Minimal format of the MCA/INIT stacks. The pseudo processes that run on
* these stacks can never sleep, they cannot return from the kernel to user
* space, they do not appear in a normal ps listing. So there is no need to
@@ -2056,18 +2026,23 @@ void __init ia64_mca_irq_init(void)
* Configure the CMCI/P vector and handler. Interrupts for CMC are
* per-processor, so AP CMC interrupts are setup in smp_callin() (smpboot.c).
*/
- register_percpu_irq(IA64_CMC_VECTOR, &cmci_irqaction);
- register_percpu_irq(IA64_CMCP_VECTOR, &cmcp_irqaction);
+ register_percpu_irq(IA64_CMC_VECTOR, "cmc_hndlr",
+ ia64_mca_cmc_int_handler);
+ register_percpu_irq(IA64_CMCP_VECTOR, "cmc_poll",
+ ia64_mca_cmc_int_caller);
ia64_mca_cmc_vector_setup(); /* Setup vector on BSP */
/* Setup the MCA rendezvous interrupt vector */
- register_percpu_irq(IA64_MCA_RENDEZ_VECTOR, &mca_rdzv_irqaction);
+ register_percpu_irq(IA64_MCA_RENDEZ_VECTOR, "mca_rdzv",
+ ia64_mca_rendez_int_handler);
/* Setup the MCA wakeup interrupt vector */
- register_percpu_irq(IA64_MCA_WAKEUP_VECTOR, &mca_wkup_irqaction);
+ register_percpu_irq(IA64_MCA_WAKEUP_VECTOR, "mca_wkup",
+ ia64_mca_wakeup_int_handler);
/* Setup the CPEI/P handler */
- register_percpu_irq(IA64_CPEP_VECTOR, &mca_cpep_irqaction);
+ register_percpu_irq(IA64_CPEP_VECTOR, "cpe_poll",
+ ia64_mca_cpe_int_caller);
}
/*
@@ -2108,7 +2083,9 @@ ia64_mca_late_init(void)
if (irq > 0) {
cpe_poll_enabled = 0;
irq_set_status_flags(irq, IRQ_PER_CPU);
- setup_irq(irq, &mca_cpe_irqaction);
+ if (request_irq(irq, ia64_mca_cpe_int_handler,
+ 0, "cpe_hndlr", NULL))
+ pr_err("Failed to register cpe_hndlr interrupt\n");
ia64_cpe_irq = irq;
ia64_mca_register_cpev(cpe_vector);
IA64_MCA_DEBUG("%s: CPEI/P setup and enabled.\n",
--
2.25.1
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