diff options
Diffstat (limited to 'arch/sparc/kernel/mdesc.c')
| -rw-r--r-- | arch/sparc/kernel/mdesc.c | 32 |
1 files changed, 19 insertions, 13 deletions
diff --git a/arch/sparc/kernel/mdesc.c b/arch/sparc/kernel/mdesc.c index fa466ce45bc9..30f171b7b00c 100644 --- a/arch/sparc/kernel/mdesc.c +++ b/arch/sparc/kernel/mdesc.c @@ -1,17 +1,18 @@ +// SPDX-License-Identifier: GPL-2.0 /* mdesc.c: Sun4V machine description handling. * * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net> */ #include <linux/kernel.h> #include <linux/types.h> -#include <linux/memblock.h> #include <linux/log2.h> #include <linux/list.h> #include <linux/slab.h> #include <linux/mm.h> #include <linux/miscdevice.h> -#include <linux/bootmem.h> +#include <linux/memblock.h> #include <linux/export.h> +#include <linux/refcount.h> #include <asm/cpudata.h> #include <asm/hypervisor.h> @@ -20,6 +21,7 @@ #include <linux/uaccess.h> #include <asm/oplib.h> #include <asm/smp.h> +#include <asm/adi.h> /* Unlike the OBP device tree, the machine description is a full-on * DAG. An arbitrary number of ARCs are possible from one @@ -37,6 +39,7 @@ struct mdesc_hdr { u32 node_sz; /* node block size */ u32 name_sz; /* name block size */ u32 data_sz; /* data block size */ + char data[]; } __attribute__((aligned(16))); struct mdesc_elem { @@ -70,7 +73,7 @@ struct mdesc_handle { struct list_head list; struct mdesc_mem_ops *mops; void *self_base; - atomic_t refcnt; + refcount_t refcnt; unsigned int handle_size; struct mdesc_hdr mdesc; }; @@ -152,7 +155,7 @@ static void mdesc_handle_init(struct mdesc_handle *hp, memset(hp, 0, handle_size); INIT_LIST_HEAD(&hp->list); hp->self_base = base; - atomic_set(&hp->refcnt, 1); + refcount_set(&hp->refcnt, 1); hp->handle_size = handle_size; } @@ -167,7 +170,7 @@ static struct mdesc_handle * __init mdesc_memblock_alloc(unsigned int mdesc_size mdesc_size); alloc_size = PAGE_ALIGN(handle_size); - paddr = memblock_alloc(alloc_size, PAGE_SIZE); + paddr = memblock_phys_alloc(alloc_size, PAGE_SIZE); hp = NULL; if (paddr) { @@ -182,12 +185,12 @@ static void __init mdesc_memblock_free(struct mdesc_handle *hp) unsigned int alloc_size; unsigned long start; - BUG_ON(atomic_read(&hp->refcnt) != 0); + BUG_ON(refcount_read(&hp->refcnt) != 0); BUG_ON(!list_empty(&hp->list)); alloc_size = PAGE_ALIGN(hp->handle_size); start = __pa(hp); - free_bootmem_late(start, alloc_size); + memblock_free_late(start, alloc_size); } static struct mdesc_mem_ops memblock_mdesc_ops = { @@ -220,7 +223,7 @@ static struct mdesc_handle *mdesc_kmalloc(unsigned int mdesc_size) static void mdesc_kfree(struct mdesc_handle *hp) { - BUG_ON(atomic_read(&hp->refcnt) != 0); + BUG_ON(refcount_read(&hp->refcnt) != 0); BUG_ON(!list_empty(&hp->list)); kfree(hp->self_base); @@ -259,7 +262,7 @@ struct mdesc_handle *mdesc_grab(void) spin_lock_irqsave(&mdesc_lock, flags); hp = cur_mdesc; if (hp) - atomic_inc(&hp->refcnt); + refcount_inc(&hp->refcnt); spin_unlock_irqrestore(&mdesc_lock, flags); return hp; @@ -271,7 +274,7 @@ void mdesc_release(struct mdesc_handle *hp) unsigned long flags; spin_lock_irqsave(&mdesc_lock, flags); - if (atomic_dec_and_test(&hp->refcnt)) { + if (refcount_dec_and_test(&hp->refcnt)) { list_del_init(&hp->list); hp->mops->free(hp); } @@ -354,6 +357,8 @@ static int get_vdev_port_node_info(struct mdesc_handle *md, u64 node, node_info->vdev_port.id = *idp; node_info->vdev_port.name = kstrdup_const(name, GFP_KERNEL); + if (!node_info->vdev_port.name) + return -1; node_info->vdev_port.parent_cfg_hdl = *parent_cfg_hdlp; return 0; @@ -513,7 +518,7 @@ void mdesc_update(void) if (status != HV_EOK || real_len > len) { printk(KERN_ERR "MD: mdesc reread fails with %lu\n", status); - atomic_dec(&hp->refcnt); + refcount_dec(&hp->refcnt); mdesc_free(hp); goto out; } @@ -526,7 +531,7 @@ void mdesc_update(void) mdesc_notify_clients(orig_hp, hp); spin_lock_irqsave(&mdesc_lock, flags); - if (atomic_dec_and_test(&orig_hp->refcnt)) + if (refcount_dec_and_test(&orig_hp->refcnt)) mdesc_free(orig_hp); else list_add(&orig_hp->list, &mdesc_zombie_list); @@ -608,7 +613,7 @@ EXPORT_SYMBOL(mdesc_get_node_info); static struct mdesc_elem *node_block(struct mdesc_hdr *mdesc) { - return (struct mdesc_elem *) (mdesc + 1); + return (struct mdesc_elem *) mdesc->data; } static void *name_block(struct mdesc_hdr *mdesc) @@ -1343,5 +1348,6 @@ void __init sun4v_mdesc_init(void) cur_mdesc = hp; + mdesc_adi_init(); report_platform_properties(); } |