From: Seth Jennings <sjenning@xxxxxxxxxxxxxxxxxx> Because we use per-cpu mapping areas shared among the pools/users, we can't allow mapping in interrupt context because it can corrupt another users mappings. Signed-off-by: Seth Jennings <sjenning@xxxxxxxxxxxxxxxxxx> Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx> --- drivers/staging/zsmalloc/zsmalloc-main.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/staging/zsmalloc/zsmalloc-main.c b/drivers/staging/zsmalloc/zsmalloc-main.c index 3c83c65..b86133f 100644 --- a/drivers/staging/zsmalloc/zsmalloc-main.c +++ b/drivers/staging/zsmalloc/zsmalloc-main.c @@ -75,6 +75,7 @@ #include <linux/cpumask.h> #include <linux/cpu.h> #include <linux/vmalloc.h> +#include <linux/hardirq.h> #include "zsmalloc.h" #include "zsmalloc_int.h" @@ -761,6 +762,13 @@ void *zs_map_object(struct zs_pool *pool, unsigned long handle, BUG_ON(!handle); + /* + * Because we use per-cpu mapping areas shared among the + * pools/users, we can't allow mapping in interrupt context + * because it can corrupt another users mappings. + */ + BUG_ON(in_interrupt()); + obj_handle_to_location(handle, &page, &obj_idx); get_zspage_mapping(get_first_page(page), &class_idx, &fg); class = &pool->size_class[class_idx]; -- 1.7.9.5 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>