On 03/20/20 at 10:50am, David Hildenbrand wrote:

On 20.03.20 08:36, Baoquan He wrote:

quoted

On 03/19/20 at 02:12pm, David Hildenbrand wrote:

quoted

Let's use a simple array which we can reuse soon. While at it, move the
string->mmop conversion out of the device hotplug lock.

Reviewed-by: Wei Yang <redacted>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Wei Yang <redacted>
Signed-off-by: David Hildenbrand <redacted>
---
 drivers/base/memory.c | 38 +++++++++++++++++++++++---------------
 1 file changed, 23 insertions(+), 15 deletions(-)

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index e7e77cafef80..8a7f29c0bf97 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c

@@ -28,6 +28,24 @@
 
 #define MEMORY_CLASS_NAME	"memory"
 
+static const char *const online_type_to_str[] = {
+	[MMOP_OFFLINE] = "offline",
+	[MMOP_ONLINE] = "online",
+	[MMOP_ONLINE_KERNEL] = "online_kernel",
+	[MMOP_ONLINE_MOVABLE] = "online_movable",
+};
+
+static int memhp_online_type_from_str(const char *str)
+{
+	int i;

I would change it as: 

	for (int i = 0; i < ARRAY_SIZE(online_type_to_str); i++) {

That's not allowed by the C90 standard (and -std=gnu89).

$ gcc main.c -std=gnu89
main.c: In function 'main':
main.c:3:2: error: 'for' loop initial declarations are only allowed in
C99 or C11 mode
    3 |  for (int i = 0; i < 8; i++) {
      |  ^~~

Good to know, thanks.

One of the reasons why
	git grep "for (int "

will result in very little hits (IOW, only 5 in driver code only).

-- 
Thanks,

David / dhildenb