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Wysocki" , Baoquan He Subject: [PATCH v2 3/8] drivers/base/memory: store mapping between MMOP_* and string in an array Date: Tue, 17 Mar 2020 11:49:37 +0100 Message-Id: <20200317104942.11178-4-david@redhat.com> In-Reply-To: <20200317104942.11178-1-david@redhat.com> References: <20200317104942.11178-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 Acked-by: Michal Hocko Cc: Greg Kroah-Hartman Cc: Andrew Morton Cc: Michal Hocko Cc: Oscar Salvador Cc: "Rafael J. Wysocki" Cc: Baoquan He Cc: Wei Yang Signed-off-by: David Hildenbrand --- 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 @@ =20 #define MEMORY_CLASS_NAME "memory" =20 +static const char *const online_type_to_str[] =3D { + [MMOP_OFFLINE] =3D "offline", + [MMOP_ONLINE] =3D "online", + [MMOP_ONLINE_KERNEL] =3D "online_kernel", + [MMOP_ONLINE_MOVABLE] =3D "online_movable", +}; + +static int memhp_online_type_from_str(const char *str) +{ + int i; + + for (i =3D 0; i < ARRAY_SIZE(online_type_to_str); i++) { + if (sysfs_streq(str, online_type_to_str[i])) + return i; + } + return -EINVAL; +} + #define to_memory_block(dev) container_of(dev, struct memory_block, dev) =20 static int sections_per_block; @@ -236,26 +254,17 @@ static int memory_subsys_offline(struct device *dev= ) static ssize_t state_store(struct device *dev, struct device_attribute *= attr, const char *buf, size_t count) { + const int online_type =3D memhp_online_type_from_str(buf); struct memory_block *mem =3D to_memory_block(dev); - int ret, online_type; + int ret; + + if (online_type < 0) + return -EINVAL; =20 ret =3D lock_device_hotplug_sysfs(); if (ret) return ret; =20 - if (sysfs_streq(buf, "online_kernel")) - online_type =3D MMOP_ONLINE_KERNEL; - else if (sysfs_streq(buf, "online_movable")) - online_type =3D MMOP_ONLINE_MOVABLE; - else if (sysfs_streq(buf, "online")) - online_type =3D MMOP_ONLINE; - else if (sysfs_streq(buf, "offline")) - online_type =3D MMOP_OFFLINE; - else { - ret =3D -EINVAL; - goto err; - } - switch (online_type) { case MMOP_ONLINE_KERNEL: case MMOP_ONLINE_MOVABLE: @@ -271,7 +280,6 @@ static ssize_t state_store(struct device *dev, struct= device_attribute *attr, ret =3D -EINVAL; /* should never happen */ } =20 -err: unlock_device_hotplug(); =20 if (ret < 0) --=20 2.24.1