From: Christian Borntraeger Date: Fri, 28 Apr 2006 01:40:11 +0000 (-0700) Subject: [PATCH] s390: fix slab debugging X-Git-Tag: v2.6.17-rc4~119 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=40ac6b204c20da09b64b6dcc10c68b6e7bd9fadd;p=linux-2.6-omap-h63xx.git [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 Signed-off-by: Martin Schwidefsky Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/s390/cio/qdio.c b/drivers/s390/cio/qdio.c index a5bf272fe77..96f519281d9 100644 --- a/drivers/s390/cio/qdio.c +++ b/drivers/s390/cio/qdio.c @@ -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; }