Merge branch 'akpm' (Andrew's fixes)
Merge misc fixes from Andrew Morton: "18 total. 15 fixes and some updates to a device_cgroup patchset which bring it up to date with the version which I should have merged in the first place." * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (18 patches) fs/compat_ioctl.c: VIDEO_SET_SPU_PALETTE missing error check gen_init_cpio: avoid stack overflow when expanding drivers/rtc/rtc-imxdi.c: add missing spin lock initialization mm, numa: avoid setting zone_reclaim_mode unless a node is sufficiently distant pidns: limit the nesting depth of pid namespaces drivers/dma/dw_dmac: make driver's endianness configurable mm/mmu_notifier: allocate mmu_notifier in advance tools/testing/selftests/epoll/test_epoll.c: fix build UAPI: fix tools/vm/page-types.c mm/page_alloc.c:alloc_contig_range(): return early for err path rbtree: include linux/compiler.h for definition of __always_inline genalloc: stop crashing the system when destroying a pool backlight: ili9320: add missing SPI dependency device_cgroup: add proper checking when changing default behavior device_cgroup: stop using simple_strtoul() device_cgroup: rename deny_all to behavior cgroup: fix invalid rcu dereference mm: fix XFS oops due to dirty pages without buffers on s390
This commit is contained in:
Linus Torvalds
Коммит
2ab3f29ddd
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|
@ -90,6 +90,17 @@ config DW_DMAC
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Support the Synopsys DesignWare AHB DMA controller. This
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can be integrated in chips such as the Atmel AT32ap7000.
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config DW_DMAC_BIG_ENDIAN_IO
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bool "Use big endian I/O register access"
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default y if AVR32
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depends on DW_DMAC
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help
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Say yes here to use big endian I/O access when reading and writing
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to the DMA controller registers. This is needed on some platforms,
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like the Atmel AVR32 architecture.
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If unsure, use the default setting.
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config AT_HDMAC
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tristate "Atmel AHB DMA support"
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depends on ARCH_AT91
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@ -98,9 +98,17 @@ struct dw_dma_regs {
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u32 DW_PARAMS;
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};
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#ifdef CONFIG_DW_DMAC_BIG_ENDIAN_IO
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#define dma_readl_native ioread32be
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#define dma_writel_native iowrite32be
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#else
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#define dma_readl_native readl
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#define dma_writel_native writel
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#endif
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/* To access the registers in early stage of probe */
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#define dma_read_byaddr(addr, name) \
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readl((addr) + offsetof(struct dw_dma_regs, name))
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dma_readl_native((addr) + offsetof(struct dw_dma_regs, name))
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/* Bitfields in DW_PARAMS */
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#define DW_PARAMS_NR_CHAN 8 /* number of channels */
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@ -216,9 +224,9 @@ __dwc_regs(struct dw_dma_chan *dwc)
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}
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#define channel_readl(dwc, name) \
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readl(&(__dwc_regs(dwc)->name))
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dma_readl_native(&(__dwc_regs(dwc)->name))
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#define channel_writel(dwc, name, val) \
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writel((val), &(__dwc_regs(dwc)->name))
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dma_writel_native((val), &(__dwc_regs(dwc)->name))
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static inline struct dw_dma_chan *to_dw_dma_chan(struct dma_chan *chan)
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{
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@ -246,9 +254,9 @@ static inline struct dw_dma_regs __iomem *__dw_regs(struct dw_dma *dw)
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}
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#define dma_readl(dw, name) \
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readl(&(__dw_regs(dw)->name))
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dma_readl_native(&(__dw_regs(dw)->name))
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#define dma_writel(dw, name, val) \
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writel((val), &(__dw_regs(dw)->name))
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dma_writel_native((val), &(__dw_regs(dw)->name))
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#define channel_set_bit(dw, reg, mask) \
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dma_writel(dw, reg, ((mask) << 8) | (mask))
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@ -392,6 +392,8 @@ static int dryice_rtc_probe(struct platform_device *pdev)
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if (imxdi->ioaddr == NULL)
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return -ENOMEM;
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spin_lock_init(&imxdi->irq_lock);
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imxdi->irq = platform_get_irq(pdev, 0);
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if (imxdi->irq < 0)
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return imxdi->irq;
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@ -60,7 +60,8 @@ config LCD_LTV350QV
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The LTV350QV panel is present on all ATSTK1000 boards.
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config LCD_ILI9320
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tristate
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tristate "ILI Technology ILI9320 controller support"
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depends on SPI
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help
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If you have a panel based on the ILI9320 controller chip
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then say y to include a power driver for it.
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|
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@ -210,6 +210,8 @@ static int do_video_set_spu_palette(unsigned int fd, unsigned int cmd,
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err = get_user(palp, &up->palette);
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err |= get_user(length, &up->length);
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if (err)
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return -EFAULT;
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up_native = compat_alloc_user_space(sizeof(struct video_spu_palette));
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err = put_user(compat_ptr(palp), &up_native->palette);
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|
|
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|
@ -24,6 +24,7 @@
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#ifndef _LINUX_RBTREE_AUGMENTED_H
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#define _LINUX_RBTREE_AUGMENTED_H
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#include <linux/compiler.h>
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#include <linux/rbtree.h>
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/*
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|
|
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|
@ -71,12 +71,22 @@ err_alloc:
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return NULL;
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}
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/* MAX_PID_NS_LEVEL is needed for limiting size of 'struct pid' */
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#define MAX_PID_NS_LEVEL 32
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static struct pid_namespace *create_pid_namespace(struct pid_namespace *parent_pid_ns)
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{
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struct pid_namespace *ns;
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unsigned int level = parent_pid_ns->level + 1;
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int i, err = -ENOMEM;
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int i;
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int err;
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if (level > MAX_PID_NS_LEVEL) {
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err = -EINVAL;
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goto out;
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}
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err = -ENOMEM;
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ns = kmem_cache_zalloc(pid_ns_cachep, GFP_KERNEL);
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if (ns == NULL)
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goto out;
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|
|
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|
@ -178,7 +178,7 @@ int gen_pool_add_virt(struct gen_pool *pool, unsigned long virt, phys_addr_t phy
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struct gen_pool_chunk *chunk;
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int nbits = size >> pool->min_alloc_order;
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int nbytes = sizeof(struct gen_pool_chunk) +
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(nbits + BITS_PER_BYTE - 1) / BITS_PER_BYTE;
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BITS_TO_LONGS(nbits) * sizeof(long);
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chunk = kmalloc_node(nbytes, GFP_KERNEL | __GFP_ZERO, nid);
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if (unlikely(chunk == NULL))
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|
|
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@ -196,28 +196,28 @@ static int do_mmu_notifier_register(struct mmu_notifier *mn,
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BUG_ON(atomic_read(&mm->mm_users) <= 0);
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/*
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* Verify that mmu_notifier_init() already run and the global srcu is
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* initialized.
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*/
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* Verify that mmu_notifier_init() already run and the global srcu is
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* initialized.
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*/
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BUG_ON(!srcu.per_cpu_ref);
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ret = -ENOMEM;
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mmu_notifier_mm = kmalloc(sizeof(struct mmu_notifier_mm), GFP_KERNEL);
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if (unlikely(!mmu_notifier_mm))
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goto out;
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if (take_mmap_sem)
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down_write(&mm->mmap_sem);
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ret = mm_take_all_locks(mm);
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if (unlikely(ret))
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goto out;
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goto out_clean;
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if (!mm_has_notifiers(mm)) {
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mmu_notifier_mm = kmalloc(sizeof(struct mmu_notifier_mm),
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GFP_KERNEL);
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if (unlikely(!mmu_notifier_mm)) {
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ret = -ENOMEM;
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goto out_of_mem;
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}
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INIT_HLIST_HEAD(&mmu_notifier_mm->list);
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spin_lock_init(&mmu_notifier_mm->lock);
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mm->mmu_notifier_mm = mmu_notifier_mm;
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mmu_notifier_mm = NULL;
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}
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atomic_inc(&mm->mm_count);
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@ -233,12 +233,12 @@ static int do_mmu_notifier_register(struct mmu_notifier *mn,
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hlist_add_head(&mn->hlist, &mm->mmu_notifier_mm->list);
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spin_unlock(&mm->mmu_notifier_mm->lock);
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out_of_mem:
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mm_drop_all_locks(mm);
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out:
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out_clean:
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if (take_mmap_sem)
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up_write(&mm->mmap_sem);
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kfree(mmu_notifier_mm);
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out:
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BUG_ON(atomic_read(&mm->mm_users) <= 0);
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return ret;
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}
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|
|
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|
@ -1809,10 +1809,10 @@ static void __paginginit init_zone_allows_reclaim(int nid)
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int i;
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for_each_online_node(i)
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if (node_distance(nid, i) <= RECLAIM_DISTANCE) {
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if (node_distance(nid, i) <= RECLAIM_DISTANCE)
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node_set(i, NODE_DATA(nid)->reclaim_nodes);
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else
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zone_reclaim_mode = 1;
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}
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}
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#else /* CONFIG_NUMA */
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|
|
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20
mm/rmap.c
20
mm/rmap.c
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|
@ -56,6 +56,7 @@
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#include <linux/mmu_notifier.h>
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#include <linux/migrate.h>
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#include <linux/hugetlb.h>
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#include <linux/backing-dev.h>
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#include <asm/tlbflush.h>
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|
@ -926,11 +927,8 @@ int page_mkclean(struct page *page)
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if (page_mapped(page)) {
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struct address_space *mapping = page_mapping(page);
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if (mapping) {
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if (mapping)
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ret = page_mkclean_file(mapping, page);
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if (page_test_and_clear_dirty(page_to_pfn(page), 1))
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ret = 1;
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}
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}
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return ret;
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|
|
@ -1116,6 +1114,7 @@ void page_add_file_rmap(struct page *page)
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*/
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void page_remove_rmap(struct page *page)
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{
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struct address_space *mapping = page_mapping(page);
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bool anon = PageAnon(page);
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bool locked;
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unsigned long flags;
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|
|
@ -1138,8 +1137,19 @@ void page_remove_rmap(struct page *page)
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* this if the page is anon, so about to be freed; but perhaps
|
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* not if it's in swapcache - there might be another pte slot
|
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* containing the swap entry, but page not yet written to swap.
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*
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* And we can skip it on file pages, so long as the filesystem
|
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* participates in dirty tracking; but need to catch shm and tmpfs
|
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* and ramfs pages which have been modified since creation by read
|
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* fault.
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*
|
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* Note that mapping must be decided above, before decrementing
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* mapcount (which luckily provides a barrier): once page is unmapped,
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* it could be truncated and page->mapping reset to NULL at any moment.
|
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* Note also that we are relying on page_mapping(page) to set mapping
|
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* to &swapper_space when PageSwapCache(page).
|
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*/
|
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if ((!anon || PageSwapCache(page)) &&
|
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if (mapping && !mapping_cap_account_dirty(mapping) &&
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page_test_and_clear_dirty(page_to_pfn(page), 1))
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set_page_dirty(page);
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/*
|
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|
|
|
|||
|
|
@ -42,7 +42,10 @@ struct dev_exception_item {
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struct dev_cgroup {
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struct cgroup_subsys_state css;
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struct list_head exceptions;
|
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bool deny_all;
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enum {
|
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DEVCG_DEFAULT_ALLOW,
|
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DEVCG_DEFAULT_DENY,
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} behavior;
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};
|
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|
||||
static inline struct dev_cgroup *css_to_devcgroup(struct cgroup_subsys_state *s)
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||||
|
|
@ -182,13 +185,13 @@ static struct cgroup_subsys_state *devcgroup_create(struct cgroup *cgroup)
|
|||
parent_cgroup = cgroup->parent;
|
||||
|
||||
if (parent_cgroup == NULL)
|
||||
dev_cgroup->deny_all = false;
|
||||
dev_cgroup->behavior = DEVCG_DEFAULT_ALLOW;
|
||||
else {
|
||||
parent_dev_cgroup = cgroup_to_devcgroup(parent_cgroup);
|
||||
mutex_lock(&devcgroup_mutex);
|
||||
ret = dev_exceptions_copy(&dev_cgroup->exceptions,
|
||||
&parent_dev_cgroup->exceptions);
|
||||
dev_cgroup->deny_all = parent_dev_cgroup->deny_all;
|
||||
dev_cgroup->behavior = parent_dev_cgroup->behavior;
|
||||
mutex_unlock(&devcgroup_mutex);
|
||||
if (ret) {
|
||||
kfree(dev_cgroup);
|
||||
|
|
@ -260,7 +263,7 @@ static int devcgroup_seq_read(struct cgroup *cgroup, struct cftype *cft,
|
|||
* - List the exceptions in case the default policy is to deny
|
||||
* This way, the file remains as a "whitelist of devices"
|
||||
*/
|
||||
if (devcgroup->deny_all == false) {
|
||||
if (devcgroup->behavior == DEVCG_DEFAULT_ALLOW) {
|
||||
set_access(acc, ACC_MASK);
|
||||
set_majmin(maj, ~0);
|
||||
set_majmin(min, ~0);
|
||||
|
|
@ -314,12 +317,12 @@ static int may_access(struct dev_cgroup *dev_cgroup,
|
|||
* In two cases we'll consider this new exception valid:
|
||||
* - the dev cgroup has its default policy to allow + exception list:
|
||||
* the new exception should *not* match any of the exceptions
|
||||
* (!deny_all, !match)
|
||||
* (behavior == DEVCG_DEFAULT_ALLOW, !match)
|
||||
* - the dev cgroup has its default policy to deny + exception list:
|
||||
* the new exception *should* match the exceptions
|
||||
* (deny_all, match)
|
||||
* (behavior == DEVCG_DEFAULT_DENY, match)
|
||||
*/
|
||||
if (dev_cgroup->deny_all == match)
|
||||
if ((dev_cgroup->behavior == DEVCG_DEFAULT_DENY) == match)
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -341,6 +344,17 @@ static int parent_has_perm(struct dev_cgroup *childcg,
|
|||
return may_access(parent, ex);
|
||||
}
|
||||
|
||||
/**
|
||||
* may_allow_all - checks if it's possible to change the behavior to
|
||||
* allow based on parent's rules.
|
||||
* @parent: device cgroup's parent
|
||||
* returns: != 0 in case it's allowed, 0 otherwise
|
||||
*/
|
||||
static inline int may_allow_all(struct dev_cgroup *parent)
|
||||
{
|
||||
return parent->behavior == DEVCG_DEFAULT_ALLOW;
|
||||
}
|
||||
|
||||
/*
|
||||
* Modify the exception list using allow/deny rules.
|
||||
* CAP_SYS_ADMIN is needed for this. It's at least separate from CAP_MKNOD
|
||||
|
|
@ -358,9 +372,11 @@ static int devcgroup_update_access(struct dev_cgroup *devcgroup,
|
|||
int filetype, const char *buffer)
|
||||
{
|
||||
const char *b;
|
||||
char *endp;
|
||||
int count;
|
||||
char temp[12]; /* 11 + 1 characters needed for a u32 */
|
||||
int count, rc;
|
||||
struct dev_exception_item ex;
|
||||
struct cgroup *p = devcgroup->css.cgroup;
|
||||
struct dev_cgroup *parent = cgroup_to_devcgroup(p->parent);
|
||||
|
||||
if (!capable(CAP_SYS_ADMIN))
|
||||
return -EPERM;
|
||||
|
|
@ -372,14 +388,18 @@ static int devcgroup_update_access(struct dev_cgroup *devcgroup,
|
|||
case 'a':
|
||||
switch (filetype) {
|
||||
case DEVCG_ALLOW:
|
||||
if (!parent_has_perm(devcgroup, &ex))
|
||||
if (!may_allow_all(parent))
|
||||
return -EPERM;
|
||||
dev_exception_clean(devcgroup);
|
||||
devcgroup->deny_all = false;
|
||||
rc = dev_exceptions_copy(&devcgroup->exceptions,
|
||||
&parent->exceptions);
|
||||
if (rc)
|
||||
return rc;
|
||||
devcgroup->behavior = DEVCG_DEFAULT_ALLOW;
|
||||
break;
|
||||
case DEVCG_DENY:
|
||||
dev_exception_clean(devcgroup);
|
||||
devcgroup->deny_all = true;
|
||||
devcgroup->behavior = DEVCG_DEFAULT_DENY;
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
|
|
@ -402,8 +422,16 @@ static int devcgroup_update_access(struct dev_cgroup *devcgroup,
|
|||
ex.major = ~0;
|
||||
b++;
|
||||
} else if (isdigit(*b)) {
|
||||
ex.major = simple_strtoul(b, &endp, 10);
|
||||
b = endp;
|
||||
memset(temp, 0, sizeof(temp));
|
||||
for (count = 0; count < sizeof(temp) - 1; count++) {
|
||||
temp[count] = *b;
|
||||
b++;
|
||||
if (!isdigit(*b))
|
||||
break;
|
||||
}
|
||||
rc = kstrtou32(temp, 10, &ex.major);
|
||||
if (rc)
|
||||
return -EINVAL;
|
||||
} else {
|
||||
return -EINVAL;
|
||||
}
|
||||
|
|
@ -416,8 +444,16 @@ static int devcgroup_update_access(struct dev_cgroup *devcgroup,
|
|||
ex.minor = ~0;
|
||||
b++;
|
||||
} else if (isdigit(*b)) {
|
||||
ex.minor = simple_strtoul(b, &endp, 10);
|
||||
b = endp;
|
||||
memset(temp, 0, sizeof(temp));
|
||||
for (count = 0; count < sizeof(temp) - 1; count++) {
|
||||
temp[count] = *b;
|
||||
b++;
|
||||
if (!isdigit(*b))
|
||||
break;
|
||||
}
|
||||
rc = kstrtou32(temp, 10, &ex.minor);
|
||||
if (rc)
|
||||
return -EINVAL;
|
||||
} else {
|
||||
return -EINVAL;
|
||||
}
|
||||
|
|
@ -452,7 +488,7 @@ static int devcgroup_update_access(struct dev_cgroup *devcgroup,
|
|||
* an matching exception instead. And be silent about it: we
|
||||
* don't want to break compatibility
|
||||
*/
|
||||
if (devcgroup->deny_all == false) {
|
||||
if (devcgroup->behavior == DEVCG_DEFAULT_ALLOW) {
|
||||
dev_exception_rm(devcgroup, &ex);
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -463,7 +499,7 @@ static int devcgroup_update_access(struct dev_cgroup *devcgroup,
|
|||
* an matching exception instead. And be silent about it: we
|
||||
* don't want to break compatibility
|
||||
*/
|
||||
if (devcgroup->deny_all == true) {
|
||||
if (devcgroup->behavior == DEVCG_DEFAULT_DENY) {
|
||||
dev_exception_rm(devcgroup, &ex);
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -533,10 +569,10 @@ struct cgroup_subsys devices_subsys = {
|
|||
*
|
||||
* returns 0 on success, -EPERM case the operation is not permitted
|
||||
*/
|
||||
static int __devcgroup_check_permission(struct dev_cgroup *dev_cgroup,
|
||||
short type, u32 major, u32 minor,
|
||||
static int __devcgroup_check_permission(short type, u32 major, u32 minor,
|
||||
short access)
|
||||
{
|
||||
struct dev_cgroup *dev_cgroup;
|
||||
struct dev_exception_item ex;
|
||||
int rc;
|
||||
|
||||
|
|
@ -547,6 +583,7 @@ static int __devcgroup_check_permission(struct dev_cgroup *dev_cgroup,
|
|||
ex.access = access;
|
||||
|
||||
rcu_read_lock();
|
||||
dev_cgroup = task_devcgroup(current);
|
||||
rc = may_access(dev_cgroup, &ex);
|
||||
rcu_read_unlock();
|
||||
|
||||
|
|
@ -558,7 +595,6 @@ static int __devcgroup_check_permission(struct dev_cgroup *dev_cgroup,
|
|||
|
||||
int __devcgroup_inode_permission(struct inode *inode, int mask)
|
||||
{
|
||||
struct dev_cgroup *dev_cgroup = task_devcgroup(current);
|
||||
short type, access = 0;
|
||||
|
||||
if (S_ISBLK(inode->i_mode))
|
||||
|
|
@ -570,13 +606,12 @@ int __devcgroup_inode_permission(struct inode *inode, int mask)
|
|||
if (mask & MAY_READ)
|
||||
access |= ACC_READ;
|
||||
|
||||
return __devcgroup_check_permission(dev_cgroup, type, imajor(inode),
|
||||
iminor(inode), access);
|
||||
return __devcgroup_check_permission(type, imajor(inode), iminor(inode),
|
||||
access);
|
||||
}
|
||||
|
||||
int devcgroup_inode_mknod(int mode, dev_t dev)
|
||||
{
|
||||
struct dev_cgroup *dev_cgroup = task_devcgroup(current);
|
||||
short type;
|
||||
|
||||
if (!S_ISBLK(mode) && !S_ISCHR(mode))
|
||||
|
|
@ -587,7 +622,7 @@ int devcgroup_inode_mknod(int mode, dev_t dev)
|
|||
else
|
||||
type = DEV_CHAR;
|
||||
|
||||
return __devcgroup_check_permission(dev_cgroup, type, MAJOR(dev),
|
||||
MINOR(dev), ACC_MKNOD);
|
||||
return __devcgroup_check_permission(type, MAJOR(dev), MINOR(dev),
|
||||
ACC_MKNOD);
|
||||
|
||||
}
|
||||
|
|
|
|||
|
|
@ -162,14 +162,14 @@ void *write_thread_function(void *function_data)
|
|||
int index;
|
||||
struct write_thread_data *thread_data =
|
||||
(struct write_thread_data *)function_data;
|
||||
while (!write_thread_data->stop)
|
||||
while (!thread_data->stop)
|
||||
for (index = 0;
|
||||
!thread_data->stop && (index < thread_data->n_fds);
|
||||
++index)
|
||||
if ((write(thread_data->fds[index], &data, 1) < 1) &&
|
||||
(errno != EAGAIN) &&
|
||||
(errno != EWOULDBLOCK)) {
|
||||
write_thread_data->status = errno;
|
||||
thread_data->status = errno;
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -35,7 +35,7 @@
|
|||
#include <sys/mount.h>
|
||||
#include <sys/statfs.h>
|
||||
#include "../../include/uapi/linux/magic.h"
|
||||
#include "../../include/linux/kernel-page-flags.h"
|
||||
#include "../../include/uapi/linux/kernel-page-flags.h"
|
||||
|
||||
|
||||
#ifndef MAX_PATH
|
||||
|
|
|
|||
|
|
@ -303,7 +303,7 @@ static int cpio_mkfile(const char *name, const char *location,
|
|||
int retval;
|
||||
int rc = -1;
|
||||
int namesize;
|
||||
int i;
|
||||
unsigned int i;
|
||||
|
||||
mode |= S_IFREG;
|
||||
|
||||
|
|
@ -381,25 +381,28 @@ error:
|
|||
|
||||
static char *cpio_replace_env(char *new_location)
|
||||
{
|
||||
char expanded[PATH_MAX + 1];
|
||||
char env_var[PATH_MAX + 1];
|
||||
char *start;
|
||||
char *end;
|
||||
char expanded[PATH_MAX + 1];
|
||||
char env_var[PATH_MAX + 1];
|
||||
char *start;
|
||||
char *end;
|
||||
|
||||
for (start = NULL; (start = strstr(new_location, "${")); ) {
|
||||
end = strchr(start, '}');
|
||||
if (start < end) {
|
||||
*env_var = *expanded = '\0';
|
||||
strncat(env_var, start + 2, end - start - 2);
|
||||
strncat(expanded, new_location, start - new_location);
|
||||
strncat(expanded, getenv(env_var), PATH_MAX);
|
||||
strncat(expanded, end + 1, PATH_MAX);
|
||||
strncpy(new_location, expanded, PATH_MAX);
|
||||
} else
|
||||
break;
|
||||
}
|
||||
for (start = NULL; (start = strstr(new_location, "${")); ) {
|
||||
end = strchr(start, '}');
|
||||
if (start < end) {
|
||||
*env_var = *expanded = '\0';
|
||||
strncat(env_var, start + 2, end - start - 2);
|
||||
strncat(expanded, new_location, start - new_location);
|
||||
strncat(expanded, getenv(env_var),
|
||||
PATH_MAX - strlen(expanded));
|
||||
strncat(expanded, end + 1,
|
||||
PATH_MAX - strlen(expanded));
|
||||
strncpy(new_location, expanded, PATH_MAX);
|
||||
new_location[PATH_MAX] = 0;
|
||||
} else
|
||||
break;
|
||||
}
|
||||
|
||||
return new_location;
|
||||
return new_location;
|
||||
}
|
||||
|
||||
|
||||
|
|
|
|||
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