litmus-rt.git - The LITMUS^RT kernel.

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author	Alan Stern <stern@rowland.harvard.edu>	2013-01-22 11:37:35 -0500
committer	Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2013-01-22 11:55:13 -0500
commit	0f815a0a700bc10547449bde6c106051a035a1b9 (patch)
tree	15fa8225bc26d460df7e97ee056e95a51067a84b /kernel/gcov/gcov.h
parent	ad2e6329666650d9cafcae9ef53fbe09ea759ae2 (diff)

USB: UHCI: fix IRQ race during initialization

This patch (as1644) fixes a race that occurs during startup in uhci-hcd. If the IRQ line is shared with other devices, it's possible for the handler routine to be called before the data structures are fully initialized. The problem is fixed by adding a check to the IRQ handler routine. If the initialization hasn't finished yet, the routine will return immediately. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-by: Don Zickus <dzickus@redhat.com> Tested-by: "Huang, Adrian (ISS Linux TW)" <adrian.huang@hp.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Diffstat (limited to 'kernel/gcov/gcov.h')

0 files changed, 0 insertions, 0 deletions

// SPDX-License-Identifier: GPL-2.0 /* * Slab allocator functions that are independent of the allocator strategy * * (C) 2012 Christoph Lameter <cl@linux.com> */ #include <linux/slab.h> #include <linux/mm.h> #include <linux/poison.h> #include <linux/interrupt.h> #include <linux/memory.h> #include <linux/cache.h> #include <linux/compiler.h> #include <linux/module.h> #include <linux/cpu.h> #include <linux/uaccess.h> #include <linux/seq_file.h> #include <linux/proc_fs.h> #include <asm/cacheflush.h> #include <asm/tlbflush.h> #include <asm/page.h> #include <linux/memcontrol.h> #define CREATE_TRACE_POINTS #include <trace/events/kmem.h> #include "slab.h" enum slab_state slab_state; LIST_HEAD(slab_caches); DEFINE_MUTEX(slab_mutex); struct kmem_cache *kmem_cache; #ifdef CONFIG_HARDENED_USERCOPY bool usercopy_fallback __ro_after_init = IS_ENABLED(CONFIG_HARDENED_USERCOPY_FALLBACK); module_param(usercopy_fallback, bool, 0400); MODULE_PARM_DESC(usercopy_fallback, "WARN instead of reject usercopy whitelist violations"); #endif static LIST_HEAD(slab_caches_to_rcu_destroy); static void slab_caches_to_rcu_destroy_workfn(struct work_struct *work); static DECLARE_WORK(slab_caches_to_rcu_destroy_work, slab_caches_to_rcu_destroy_workfn); /* * Set of flags that will prevent slab merging */ #define SLAB_NEVER_MERGE (SLAB_RED_ZONE | SLAB_POISON | SLAB_STORE_USER | \ SLAB_TRACE | SLAB_TYPESAFE_BY_RCU | SLAB_NOLEAKTRACE | \ SLAB_FAILSLAB | SLAB_KASAN) #define SLAB_MERGE_SAME (SLAB_RECLAIM_ACCOUNT | SLAB_CACHE_DMA | \ SLAB_ACCOUNT) /* * Merge control. If this is set then no merging of slab caches will occur. */ static bool slab_nomerge = !IS_ENABLED(CONFIG_SLAB_MERGE_DEFAULT); static int __init setup_slab_nomerge(char *str) { slab_nomerge = true; return 1; } #ifdef CONFIG_SLUB __setup_param("slub_nomerge", slub_nomerge, setup_slab_nomerge, 0); #endif __setup("slab_nomerge", setup_slab_nomerge); /* * Determine the size of a slab object */ unsigned int kmem_cache_size(struct kmem_cache *s) { return s->object_size; } EXPORT_SYMBOL(kmem_cache_size); #ifdef CONFIG_DEBUG_VM static int kmem_cache_sanity_check(const char *name, unsigned int size) { if (!name || in_interrupt() || size < sizeof(void *) || size > KMALLOC_MAX_SIZE) { pr_err("kmem_cache_create(%s) integrity check failed\n", name); return -EINVAL; } WARN_ON(strchr(name, ' ')); /* It confuses parsers */ return 0; } #else static inline int kmem_cache_sanity_check(const char *name, unsigned int size) { return 0; } #endif void __kmem_cache_free_bulk(struct kmem_cache *s, size_t nr, void **p) { size_t i; for (i = 0; i < nr; i++) { if (s) kmem_cache_free(s, p[i]); else kfree(p[i]); } } int __kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t nr, void **p) { size_t i;


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