3 files changed, 5 insertions, 5 deletions

diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index d6cb0ff6988e..d5a89d067f98 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -929,7 +929,7 @@ static int erst_check_table(struct acpi_table_erst *erst_tab)
         return 0;
 }
 
-static size_t erst_reader(u64 *id, enum pstore_type_id *type,
+static ssize_t erst_reader(u64 *id, enum pstore_type_id *type,
                        struct timespec *time);
 static u64 erst_writer(enum pstore_type_id type, size_t size);
 
@@ -957,7 +957,7 @@ struct cper_pstore_record {
         char data[];
 } __packed;
 
-static size_t erst_reader(u64 *id, enum pstore_type_id *type,
+static ssize_t erst_reader(u64 *id, enum pstore_type_id *type,
                        struct timespec *time)
 {
         int rc;
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index f835a25625ff..912403c2a93d 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -152,7 +152,7 @@ EXPORT_SYMBOL_GPL(pstore_register);
 void pstore_get_records(void)
 {
         struct pstore_info *psi = psinfo;
-        size_t                  size;
+        ssize_t                 size;
         u64                     id;
         enum pstore_type_id     type;
         struct timespec         time;
@@ -163,7 +163,7 @@ void pstore_get_records(void)
 
         mutex_lock(&psinfo->buf_mutex);
         while ((size = psi->read(&id, &type, &time)) > 0) {
-                if (pstore_mkfile(type, psi->name, id, psi->buf, size,
+                if (pstore_mkfile(type, psi->name, id, psi->buf, (size_t)size,
                                   time, psi->erase))
                         failed++;
         }
diff --git a/include/linux/pstore.h b/include/linux/pstore.h
index 41977737bb7d..14ce2f5d08af 100644
--- a/include/linux/pstore.h
+++ b/include/linux/pstore.h
@@ -35,7 +35,7 @@ struct pstore_info {
         struct mutex    buf_mutex;      /* serialize access to 'buf' */
         char            *buf;
         size_t          bufsize;
-        size_t          (*read)(u64 *id, enum pstore_type_id *type,
+        ssize_t         (*read)(u64 *id, enum pstore_type_id *type,
                         struct timespec *time);
         u64             (*write)(enum pstore_type_id type, size_t size);
         int             (*erase)(u64 id);