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[PATCH] s390: fix slab debugging 

With CONFIG_SLAB_DEBUG=y networking over qeth doesn't work.  The problem is
that the qib structure embedded in the qeth_irq structure needs an alignment
of 256 but kmalloc only guarantees an alignment of 8.  When using SLAB
debugging the alignment of qeth_irq is not sufficient for the embedded qib
structure which causes all users of qdio (qeth and zfcp) to stop working.
Allocate qeth_irq structure with __get_free_page.  That wastes a small amount
of memory (~2500 bytes) per online adapter.

Signed-off-by: Christian Borntraeger <cborntra@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christian Borntraeger 2006-04-27 18:40:11 -07:00 committed by Linus Torvalds
parent 39ccf95e28
commit 40ac6b204c
1 changed files with 3 additions and 3 deletions
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6
drivers/s390/cio/qdio.c
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@ -1640,7 +1640,7 @@ next:
}
kfree(irq_ptr->qdr);
kfree(irq_ptr);
free_page((unsigned long) irq_ptr);
}
static void
@ -2983,7 +2983,7 @@ qdio_allocate(struct qdio_initialize *init_data)
qdio_allocate_do_dbf(init_data);
/* create irq */
irq_ptr = kzalloc(sizeof(struct qdio_irq), GFP_KERNEL | GFP_DMA);
irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
@ -2998,7 +2998,7 @@ qdio_allocate(struct qdio_initialize *init_data)
/* QDR must be in DMA area since CCW data address is only 32 bit */
irq_ptr->qdr=kmalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA);
if (!(irq_ptr->qdr)) {
kfree(irq_ptr);
free_page((unsigned long) irq_ptr);
QDIO_PRINT_ERR("kmalloc of irq_ptr->qdr failed!\n");
return -ENOMEM;
}