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| author | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2019-05-14 15:41:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-14 19:52:48 -0700 |
| commit | 4d36e6f8040486f5945a3ba8a741eafe9d1d023a (patch) | |
| tree | 8bbef9ceeff9bcc1b2c0e7a659d055c5c442218f /mm/vmalloc.c | |
| parent | 68571be99f323c3c3db62a8513a43380ccefe97c (diff) | |
| download | lwn-4d36e6f8040486f5945a3ba8a741eafe9d1d023a.tar.gz lwn-4d36e6f8040486f5945a3ba8a741eafe9d1d023a.zip | |
mm/vmalloc.c: convert vmap_lazy_nr to atomic_long_t
vmap_lazy_nr variable has atomic_t type that is 4 bytes integer value on
both 32 and 64 bit systems. lazy_max_pages() deals with "unsigned long"
that is 8 bytes on 64 bit system, thus vmap_lazy_nr should be 8 bytes on
64 bit as well.
Link: http://lkml.kernel.org/r/20190131162452.25879-1-urezki@gmail.com
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Thomas Garnier <thgarnie@google.com>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@sonymobile.com>
Cc: Joel Fernandes <joelaf@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmalloc.c')
| -rw-r--r-- | mm/vmalloc.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 072c8e0df90a..67bbb8d2a0a8 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -633,7 +633,7 @@ static unsigned long lazy_max_pages(void) return log * (32UL * 1024 * 1024 / PAGE_SIZE); } -static atomic_t vmap_lazy_nr = ATOMIC_INIT(0); +static atomic_long_t vmap_lazy_nr = ATOMIC_LONG_INIT(0); /* * Serialize vmap purging. There is no actual criticial section protected @@ -651,7 +651,7 @@ static void purge_fragmented_blocks_allcpus(void); */ void set_iounmap_nonlazy(void) { - atomic_set(&vmap_lazy_nr, lazy_max_pages()+1); + atomic_long_set(&vmap_lazy_nr, lazy_max_pages()+1); } /* @@ -659,10 +659,10 @@ void set_iounmap_nonlazy(void) */ static bool __purge_vmap_area_lazy(unsigned long start, unsigned long end) { + unsigned long resched_threshold; struct llist_node *valist; struct vmap_area *va; struct vmap_area *n_va; - int resched_threshold; lockdep_assert_held(&vmap_purge_lock); @@ -682,16 +682,16 @@ static bool __purge_vmap_area_lazy(unsigned long start, unsigned long end) } flush_tlb_kernel_range(start, end); - resched_threshold = (int) lazy_max_pages() << 1; + resched_threshold = lazy_max_pages() << 1; spin_lock(&vmap_area_lock); llist_for_each_entry_safe(va, n_va, valist, purge_list) { - int nr = (va->va_end - va->va_start) >> PAGE_SHIFT; + unsigned long nr = (va->va_end - va->va_start) >> PAGE_SHIFT; __free_vmap_area(va); - atomic_sub(nr, &vmap_lazy_nr); + atomic_long_sub(nr, &vmap_lazy_nr); - if (atomic_read(&vmap_lazy_nr) < resched_threshold) + if (atomic_long_read(&vmap_lazy_nr) < resched_threshold) cond_resched_lock(&vmap_area_lock); } spin_unlock(&vmap_area_lock); @@ -728,10 +728,10 @@ static void purge_vmap_area_lazy(void) */ static void free_vmap_area_noflush(struct vmap_area *va) { - int nr_lazy; + unsigned long nr_lazy; - nr_lazy = atomic_add_return((va->va_end - va->va_start) >> PAGE_SHIFT, - &vmap_lazy_nr); + nr_lazy = atomic_long_add_return((va->va_end - va->va_start) >> + PAGE_SHIFT, &vmap_lazy_nr); /* After this point, we may free va at any time */ llist_add(&va->purge_list, &vmap_purge_list); |