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Date: Wed, 8 Dec 2010 15:18:57 +0800
From: Feng Tang <feng.tang@...el.com>
To: Thomas Gleixner <tglx@...utronix.de>
CC: Yinghai Lu <yinghai@...nel.org>,
"mingo@...hat.com" <mingo@...hat.com>,
"hpa@...or.com" <hpa@...or.com>,
"alan@...ux.intel.com" <alan@...ux.intel.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"Brown, Len" <len.brown@...el.com>,
"linux-tip-commits@...r.kernel.org"
<linux-tip-commits@...r.kernel.org>
Subject: Re: [tip:x86/platform] x86: Unify current 3 similar ways of saving
IRQ info
On Wed, 8 Dec 2010 06:32:46 +0800
Thomas Gleixner <tglx@...utronix.de> wrote:
> Nice archaelogical detective work ! :)
>
> So now I have Fengs patch plus Yinghais series which seem to go nicely
> together, but I have the feeling that there is some stuff unresolved.
>
> Yinghai, Feng: could you please work out the missing bits an pieces
> (if any) and provide me a delta patch on top of the existing patches?
>
> Thanks,
>
> tglx
Here is the incremental patch against my last one (I also put the full
patch in attachment)
Thanks,
Feng
----------------
x86: more simplification for saving irq info code
Signed-off-by: Feng Tang <feng.tang@...ux.intel.com>
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 4aa4dbc..43eade5 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -126,39 +126,6 @@ static int __init parse_noapic(char *str)
}
early_param("noapic", parse_noapic);
-static void assign_to_mp_irq(struct mpc_intsrc *m,
- struct mpc_intsrc *mp_irq)
-{
- mp_irq->dstapic = m->dstapic;
- mp_irq->type = m->type;
- mp_irq->irqtype = m->irqtype;
- mp_irq->irqflag = m->irqflag;
- mp_irq->srcbus = m->srcbus;
- mp_irq->srcbusirq = m->srcbusirq;
- mp_irq->dstirq = m->dstirq;
-}
-
-static int mp_irq_mpc_intsrc_cmp(struct mpc_intsrc *mp_irq,
- struct mpc_intsrc *m)
-{
- if (mp_irq->dstapic != m->dstapic)
- return 1;
- if (mp_irq->type != m->type)
- return 2;
- if (mp_irq->irqtype != m->irqtype)
- return 3;
- if (mp_irq->irqflag != m->irqflag)
- return 4;
- if (mp_irq->srcbus != m->srcbus)
- return 5;
- if (mp_irq->srcbusirq != m->srcbusirq)
- return 6;
- if (mp_irq->dstirq != m->dstirq)
- return 7;
-
- return 0;
-}
-
/* Will be called in mpparse/acpi/sfi codes for saving IRQ info */
void mp_save_irq(struct mpc_intsrc *m)
{
@@ -170,11 +137,11 @@ void mp_save_irq(struct mpc_intsrc *m)
m->srcbusirq, m->dstapic, m->dstirq);
for (i = 0; i < mp_irq_entries; i++) {
- if (!mp_irq_mpc_intsrc_cmp(&mp_irqs[i], m))
+ if (!memcmp(&mp_irqs[i], m, sizeof(*m)))
return;
}
- assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
+ memcpy(&mp_irqs[mp_irq_entries], m, sizeof(*m));
if (++mp_irq_entries == MAX_IRQ_SOURCES)
panic("Max # of irq sources exceeded!!\n");
}
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 1fe4e79..c2c2e56 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -118,21 +118,8 @@ static void __init MP_bus_info(struct mpc_bus *m)
static void __init MP_ioapic_info(struct mpc_ioapic *m)
{
- if (!(m->flags & MPC_APIC_USABLE))
- return;
-
- printk(KERN_INFO "I/O APIC #%d Version %d at 0x%X.\n",
- m->apicid, m->apicver, m->apicaddr);
-
- mp_register_ioapic(m->apicid, m->apicaddr, gsi_top);
-}
-
-static void print_MP_intsrc_info(struct mpc_intsrc *m)
-{
- apic_printk(APIC_VERBOSE, "Int: type %d, pol %d, trig %d, bus %02x,"
- " IRQ %02x, APIC ID %x, APIC INT %02x\n",
- m->irqtype, m->irqflag & 3, (m->irqflag >> 2) & 3, m->srcbus,
- m->srcbusirq, m->dstapic, m->dstirq);
+ if (m->flags & MPC_APIC_USABLE)
+ mp_register_ioapic(m->apicid, m->apicaddr, gsi_top);
}
static void __init print_mp_irq_info(struct mpc_intsrc *mp_irq)
@@ -144,23 +131,11 @@ static void __init print_mp_irq_info(struct mpc_intsrc *mp_irq)
mp_irq->srcbusirq, mp_irq->dstapic, mp_irq->dstirq);
}
-static void __init assign_to_mpc_intsrc(struct mpc_intsrc *mp_irq,
- struct mpc_intsrc *m)
-{
- m->dstapic = mp_irq->dstapic;
- m->type = mp_irq->type;
- m->irqtype = mp_irq->irqtype;
- m->irqflag = mp_irq->irqflag;
- m->srcbus = mp_irq->srcbus;
- m->srcbusirq = mp_irq->srcbusirq;
- m->dstirq = mp_irq->dstirq;
-}
#else /* CONFIG_X86_IO_APIC */
static inline void __init MP_bus_info(struct mpc_bus *m) {}
static inline void __init MP_ioapic_info(struct mpc_ioapic *m) {}
#endif /* CONFIG_X86_IO_APIC */
-
static void __init MP_lintsrc_info(struct mpc_lintsrc *m)
{
apic_printk(APIC_VERBOSE, "Lint: type %d, pol %d, trig %d, bus %02x,"
@@ -172,7 +147,6 @@ static void __init MP_lintsrc_info(struct mpc_lintsrc *m)
/*
* Read/parse the MPC
*/
-
static int __init smp_check_mpc(struct mpc_table *mpc, char *oem, char *str)
{
@@ -734,11 +708,11 @@ static void __init check_irq_src(struct mpc_intsrc *m, int *nr_m_spare)
int i;
apic_printk(APIC_VERBOSE, "OLD ");
- print_MP_intsrc_info(m);
+ print_mp_irq_info(m);
i = get_MP_intsrc_index(m);
if (i > 0) {
- assign_to_mpc_intsrc(&mp_irqs[i], m);
+ memcpy(m, &mp_irqs[i], sizeof(*m));
apic_printk(APIC_VERBOSE, "NEW ");
print_mp_irq_info(&mp_irqs[i]);
return;
@@ -825,14 +799,14 @@ static int __init replace_intsrc_all(struct mpc_table *mpc,
if (nr_m_spare > 0) {
apic_printk(APIC_VERBOSE, "*NEW* found\n");
nr_m_spare--;
- assign_to_mpc_intsrc(&mp_irqs[i], m_spare[nr_m_spare]);
+ memcpy(m_spare[nr_m_spare], &mp_irqs[i], sizeof(mp_irqs[i]));
m_spare[nr_m_spare] = NULL;
} else {
struct mpc_intsrc *m = (struct mpc_intsrc *)mpt;
count += sizeof(struct mpc_intsrc);
if (check_slot(mpc_new_phys, mpc_new_length, count) < 0)
goto out;
- assign_to_mpc_intsrc(&mp_irqs[i], m);
+ memcpy(m, &mp_irqs[i], sizeof(*m));
mpc->length = count;
mpt += sizeof(struct mpc_intsrc);
}
View attachment "0001-x86-unify-current-3-similar-ways-of-saving-IRQ-info.patch" of type "text/x-patch" (11103 bytes)
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