Commit 4afc51a8 authored by Eric W. Biederman's avatar Eric W. Biederman Committed by H. Peter Anvin
Browse files

x86, ioapic: Simplify probe_nr_irqs_gsi. 



Use the global gsi_end value now that all ioapics have
valid gsi numbers instead of a combination of acpi_probe_gsi
and walking all of the ioapics and couting their number of
entries by hand if acpi_probe_gsi gave us an answer we did
not like.

Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
LKML-Reference: <1269936436-7039-13-git-send-email-ebiederm@xmission.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
parent d464207c

arch/x86/include/asm/mpspec.h

+0 −6
Original line number Diff line number Diff line
@@ -105,12 +105,6 @@ extern void mp_config_acpi_legacy_irqs(void); 
struct device;

extern int mp_register_gsi(struct device *dev, u32 gsi, int edge_level,

				 int active_high_low);

extern int acpi_probe_gsi(void);

#else /* !CONFIG_ACPI: */

static inline int acpi_probe_gsi(void)

{

	return 0;

}

#endif /* CONFIG_ACPI */



#define PHYSID_ARRAY_SIZE	BITS_TO_LONGS(MAX_APICS)

arch/x86/kernel/acpi/boot.c

+0 −23
Original line number Diff line number Diff line
@@ -876,29 +876,6 @@ static int __init acpi_parse_madt_lapic_entries(void) 
extern int es7000_plat;

#endif



int __init acpi_probe_gsi(void)

{

	int idx;

	int gsi;

	int max_gsi = 0;



	if (acpi_disabled)

		return 0;



	if (!acpi_ioapic)

		return 0;



	max_gsi = 0;

	for (idx = 0; idx < nr_ioapics; idx++) {

		gsi = mp_gsi_routing[idx].gsi_end;



		if (gsi > max_gsi)

			max_gsi = gsi;

	}



	return max_gsi + 1;

}



static void assign_to_mp_irq(struct mpc_intsrc *m,

				    struct mpc_intsrc *mp_irq)

{

arch/x86/kernel/apic/io_apic.c

+3 −14
Original line number Diff line number Diff line
@@ -3850,22 +3850,11 @@ int __init io_apic_get_redir_entries (int ioapic) 


void __init probe_nr_irqs_gsi(void)

{

	int nr = 0;



	nr = acpi_probe_gsi();

	if (nr > nr_irqs_gsi) {

		nr_irqs_gsi = nr;

	} else {

		/* for acpi=off or acpi is not compiled in */

		int idx;



		nr = 0;

		for (idx = 0; idx < nr_ioapics; idx++)

			nr += io_apic_get_redir_entries(idx);

	int nr;



	nr = gsi_end + 1;

	if (nr > nr_irqs_gsi)

		nr_irqs_gsi = nr;

	}



	printk(KERN_DEBUG "nr_irqs_gsi: %d\n", nr_irqs_gsi);

}

CRA Git | Maintained and supported by SUSTech CRA and CCSE