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| author | Yinghai Lu <yhlu.kernel@gmail.com> | 2008-08-20 05:50:03 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-16 16:52:08 +0200 |
| commit | 71f521bbaf375b685aeea20c6b0ed8600cd6edfe (patch) | |
| tree | a18b8e8284ff7a68c341de8b1342866b9821ae7f /drivers/parisc/iosapic.c | |
| parent | irq: sparse irqs, fix #3 (diff) | |
| download | linux-71f521bbaf375b685aeea20c6b0ed8600cd6edfe.tar.xz linux-71f521bbaf375b685aeea20c6b0ed8600cd6edfe.zip | |
x86, irq: get nr_irqs from madt
Until now, NR_IRQS was derived from black magic defines that had to
be "large enough" to both accomodate NR_CPUS and MAX_NR_IO_APICs.
This resulted in a way too large irq_desc[] array on most x86 systems.
Especially with larger CPU masks, the size of irq_desc can spiral out
of control quickly.
So be smarter about it and use precise allocation instead: determine the
default maximum possible IRQ number from the ACPI MADT. Use a minimum limit
of at least 32 IRQs for broken BIOSes.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/parisc/iosapic.c')
0 files changed, 0 insertions, 0 deletions