mm/mem-hotplug: replace simple_strtoull() with kstrtoull()

Use the newer and more pleasant kstrtoull() to replace
simple_strtoull(), because simple_strtoull() is marked for obsoletion.

Signed-off-by: Zhang Zhen <zhenzhang.zhang@huawei.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 7c60ed27e711..a2e13e250bba 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -406,7 +406,9 @@ memory_probe_store(struct device *dev, struct device_attribute *attr,
         int i, ret;
         unsigned long pages_per_block = PAGES_PER_SECTION * sections_per_block;
 
-        phys_addr = simple_strtoull(buf, NULL, 0);
+        ret = kstrtoull(buf, 0, &phys_addr);
+        if (ret)
+                return ret;
 
         if (phys_addr & ((pages_per_block << PAGE_SHIFT) - 1))
                 return -EINVAL;