search for: atomic_dec

...: "=r"(ia64_intri_res) : "r"(p), "i" (inc) \ > - : "memory"); \ > -} while (0) > -static inline void atomic_inc(uint32_t *v) { ia64_fetchadd4_rel(v, 1); } > -static inline void atomic_dec(uint32_t *v) { ia64_fetchadd4_rel(v, -1); } > -#elif defined(__arm__) > +#if defined(__arm__) > static inline void atomic_inc(uint32_t *v) > { > unsigned long tmp; > int result; > > - __asm__ __volatile__("@ atomic_add\n" > + __asm...

...node *inode, struct file *filep) > { > struct vhost_vdpa *v; > @@ -809,7 +815,7 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep) > return 0; > > err_init_iotlb: > - vhost_dev_cleanup(&v->vdev); > + vhost_vdpa_cleanup(v); > err: > atomic_dec(&v->opened); > return r; > @@ -840,8 +846,7 @@ static int vhost_vdpa_release(struct inode *inode, struct file *filep) > vhost_vdpa_free_domain(v); > vhost_vdpa_config_put(v); > vhost_vdpa_clean_irq(v); > - vhost_dev_cleanup(&v->vdev); > - kfree(v->vdev....

This patch should fix the bug reported in https://lkml.org/lkml/2014/9/11/249. Test is still pending. David Hildenbrand (1): blk-mq: Avoid race condition with uninitialized requests block/blk-mq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) -- 1.8.5.5

This patch should fix the bug reported in https://lkml.org/lkml/2014/9/11/249. Test is still pending. David Hildenbrand (1): blk-mq: Avoid race condition with uninitialized requests block/blk-mq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) -- 1.8.5.5

...ns(-) diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index 86eff48..43d1c5a 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -818,6 +818,7 @@ static void free_workspace(int type, struct list_head *workspace) btrfs_compress_op[idx]->free_workspace(workspace); atomic_dec(alloc_workspace); wake: + smp_mb(); if (waitqueue_active(workspace_wait)) wake_up(workspace_wait); } diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c index 335605c..8cc9b19 100644 --- a/fs/btrfs/delayed-inode.c +++ b/fs/btrfs/delayed-inode.c @@ -513,9 +513,11 @@ static void _...

...ount reference anymore */ + if (!pmd_migration) { + /* + * Set PG_double_map before dropping compound_mapcount to avoid + * false-negative page_mapped(). + */ + if (compound_mapcount(page) > 1 && + !TestSetPageDoubleMap(page)) { for (i = 0; i < HPAGE_PMD_NR; i++) - atomic_dec(&page[i]._mapcount); + atomic_inc(&page[i]._mapcount); + } + + lock_page_memcg(page); + if (atomic_add_negative(-1, compound_mapcount_ptr(page))) { + /* Last compound_mapcount is gone. */ + __dec_lruvec_page_state(page, NR_ANON_THPS); + if (TestClearPageDoubleMap(page)) { + /...

...ev.vqs); +} + static int vhost_vdpa_open(struct inode *inode, struct file *filep) { struct vhost_vdpa *v; @@ -809,7 +815,7 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep) return 0; err_init_iotlb: - vhost_dev_cleanup(&v->vdev); + vhost_vdpa_cleanup(v); err: atomic_dec(&v->opened); return r; @@ -840,8 +846,7 @@ static int vhost_vdpa_release(struct inode *inode, struct file *filep) vhost_vdpa_free_domain(v); vhost_vdpa_config_put(v); vhost_vdpa_clean_irq(v); - vhost_dev_cleanup(&v->vdev); - kfree(v->vdev.vqs); + vhost_vdpa_cleanup(v); mu...

...gt;> struct vhost_vdpa *v; >> @@ -809,7 +815,7 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep) >> return 0; >> >> err_init_iotlb: >> - vhost_dev_cleanup(&v->vdev); >> + vhost_vdpa_cleanup(v); >> err: >> atomic_dec(&v->opened); >> return r; >> @@ -840,8 +846,7 @@ static int vhost_vdpa_release(struct inode *inode, struct file *filep) >> vhost_vdpa_free_domain(v); >> vhost_vdpa_config_put(v); >> vhost_vdpa_clean_irq(v); >> - vhost_dev_cleanup(&v->vde...

...ASSERT(data); + + dgInfo->entry->recvCB(dgInfo->entry->clientData, &dgInfo->msg); + + vmci_resource_release(&dgInfo->entry->resource); + + inDGHostQueue = dgInfo->inDGHostQueue; + kfree(dgInfo); + + if (inDGHostQueue) + atomic_dec(&delayedDGHostQueueSize); +} + +/* + * Dispatch datagram as a host, to the host, or other vm context. This + * function cannot dispatch to hypervisor context handlers. This should + * have been handled before we get here by VMCIDatagramDispatch. + * Returns number of bytes sent on success, erro...

...ASSERT(data); + + dgInfo->entry->recvCB(dgInfo->entry->clientData, &dgInfo->msg); + + vmci_resource_release(&dgInfo->entry->resource); + + inDGHostQueue = dgInfo->inDGHostQueue; + kfree(dgInfo); + + if (inDGHostQueue) + atomic_dec(&delayedDGHostQueueSize); +} + +/* + * Dispatch datagram as a host, to the host, or other vm context. This + * function cannot dispatch to hypervisor context handlers. This should + * have been handled before we get here by VMCIDatagramDispatch. + * Returns number of bytes sent on success, erro...

...f86atomic.h index 8c4b696..66a8d9a 100644 --- a/xf86atomic.h +++ b/xf86atomic.h @@ -49,7 +49,8 @@ typedef struct { # define atomic_read(x) ((x)->atomic) # define atomic_set(x, val) ((x)->atomic = (val)) # define atomic_inc(x) ((void) __sync_fetch_and_add (&(x)->atomic, 1)) -# define atomic_dec_and_test(x) (__sync_fetch_and_add (&(x)->atomic, -1) == 1) +# define atomic_inc_return(x) (__sync_add_and_fetch (&(x)->atomic, 1)) +# define atomic_dec_and_test(x) (__sync_add_and_fetch (&(x)->atomic, -1) == 0) # define atomic_add(x, v) ((void) __sync_add_and_fetch(&(x)-&g...

...ration) { > + /* > + * Set PG_double_map before dropping compound_mapcount to avoid > + * false-negative page_mapped(). > + */ > + if (compound_mapcount(page) > 1 && > + !TestSetPageDoubleMap(page)) { > for (i = 0; i < HPAGE_PMD_NR; i++) > - atomic_dec(&page[i]._mapcount); > + atomic_inc(&page[i]._mapcount); > + } > + > + lock_page_memcg(page); > + if (atomic_add_negative(-1, compound_mapcount_ptr(page))) { > + /* Last compound_mapcount is gone. */ > + __dec_lruvec_page_state(page, NR_ANON_THPS); > + if...

...@@ -49,6 +49,7 @@ typedef struct { # define atomic_read(x) ((x)->atomic) # define atomic_set(x, val) ((x)->atomic = (val)) # define atomic_inc(x) ((void) __sync_fetch_and_add (&(x)->atomic, 1)) +# define atomic_inc_return(x) (__sync_add_and_fetch (&(x)->atomic, 1)) # define atomic_dec_and_test(x) (__sync_fetch_and_add (&(x)->atomic, -1) == 1) # define atomic_add(x, v) ((void) __sync_add_and_fetch(&(x)->atomic, (v))) # define atomic_dec(x, v) ((void) __sync_sub_and_fetch(&(x)->atomic, (v))) @@ -68,6 +69,7 @@ typedef struct { # define atomic_read(x) AO_load...

The following patches shave some rough edges off the tools build system to allow cross compiling for at least arm32 and arm64 based on the Debian/Ubuntu multiarch infrastructure. They also add the necessary fixes to build for arm64 (which I have only tried cross, not native). I have posted some instructions on how to compile with these patches on the wiki:

...in getting very lucky with the "NMI or MCE in a 1 instruction race window on sysret" and managing to execute code in the hypervisor context. * Make use of set_ist() from the previous patch in the series to avoid open-coding the IST manipulation. Changes since v1: * Reintroduce atomic_dec(&waiting_for_crash_ipi); which got missed during the original refactoring. * Fold trap_nop into the middle of enable_nmis to reuse the iret. * Expand comments in areas as per Tim''s suggestions. diff -r ef8c1b607b10 -r 96b068439bc4 xen/arch/x86/crash.c --- a/xen/arch/x86/crash.c +...

...100644 > --- a/xf86atomic.h > +++ b/xf86atomic.h > @@ -49,7 +49,8 @@ typedef struct { > # define atomic_read(x) ((x)->atomic) > # define atomic_set(x, val) ((x)->atomic = (val)) > # define atomic_inc(x) ((void) __sync_fetch_and_add (&(x)->atomic, 1)) > -# define atomic_dec_and_test(x) (__sync_fetch_and_add (&(x)->atomic, -1) == 1) > +# define atomic_inc_return(x) (__sync_add_and_fetch (&(x)->atomic, 1)) > +# define atomic_dec_and_test(x) (__sync_add_and_fetch (&(x)->atomic, -1) == 0) The atomic_dec_and_test change seems like unrelated bugfi...

Hi, my system suddenly crashed and gave me this dump: http://imgur.com/oO6S0 I checked and there is not btrfs commit in linus'' tree since I compiled this kernel. Gustavo

...ount reference anymore */ + if (!pmd_migration) { + /* + * Set PG_double_map before dropping compound_mapcount to avoid + * false-negative page_mapped(). + */ + if (compound_mapcount(page) > 1 && + !TestSetPageDoubleMap(page)) { for (i = 0; i < HPAGE_PMD_NR; i++) - atomic_dec(&page[i]._mapcount); + atomic_inc(&page[i]._mapcount); + } + + lock_page_memcg(page); + if (atomic_add_negative(-1, compound_mapcount_ptr(page))) { + /* Last compound_mapcount is gone. */ + __dec_lruvec_page_state(page, NR_ANON_THPS); + if (TestClearPageDoubleMap(page)) { + /...

...omic.h >> +++ b/xf86atomic.h >> @@ -49,7 +49,8 @@ typedef struct { >> # define atomic_read(x) ((x)->atomic) >> # define atomic_set(x, val) ((x)->atomic = (val)) >> # define atomic_inc(x) ((void) __sync_fetch_and_add (&(x)->atomic, 1)) >> -# define atomic_dec_and_test(x) (__sync_fetch_and_add (&(x)->atomic, -1) == 1) >> +# define atomic_inc_return(x) (__sync_add_and_fetch (&(x)->atomic, 1)) >> +# define atomic_dec_and_test(x) (__sync_add_and_fetch (&(x)->atomic, -1) == 0) > The atomic_dec_and_test change seems like un...

V4 changes: add Acked-by: Joel Becker <jlbec at evilplan.org> V3 changes: - add Cc: stable at vger.kernel.org in the patch header to align with stable rules - add Acked-by: Jeff Moyer <jmoyer at redhat.com> V2 changes: - update the patch header of the first patch to make it more clear. This patch list fixes an issue about ocfs2 aio/dio write process hang. The call trace is like