Commit 40ac6b20 authored by Christian Borntraeger's avatar Christian Borntraeger Committed by Linus Torvalds
Browse files

[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: default avatarChristian Borntraeger <>
Signed-off-by: default avatarMartin Schwidefsky <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 39ccf95e
......@@ -1640,7 +1640,7 @@ next:
free_page((unsigned long) irq_ptr);
static void
......@@ -2983,7 +2983,7 @@ qdio_allocate(struct qdio_initialize *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);
......@@ -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)) {
free_page((unsigned long) irq_ptr);
QDIO_PRINT_ERR("kmalloc of irq_ptr->qdr failed!\n");
return -ENOMEM;
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment