procfs: fix for http://postpeta.pccluster.org/redmine/issues/119#note-30

kernel/include/syscall.h

@@ -251,9 +251,9 @@ struct procfs_read {
 	unsigned long pbuf;	/* physical address of the host buffer (request) */
 	unsigned long offset;	/* offset to read (request) */
 	int count;		/* bytes to read (request) */
-	int error;		/* non-zero if below fields are invalid. (answer) */
 	int eof;		/* if eof is detected, 1 otherwise 0. (answer)*/
 	int ret;		/* read bytes (answer) */
+	int status;		/* non-zero if done (answer) */
 	int newcpu;		/* migrated new cpu (answer) */
 	char fname[PROCFS_NAME_MAX];	/* procfs filename (request) */
 };

kernel/procfs.c

@@ -449,6 +449,7 @@ end:
 	dprintf("ret: %d, eof: %d\n", ans, eof);
 	r->ret = ans;
 	r->eof = eof;
+	r->status = 1; /* done */
 	packet.err = 0;
 bufunavail:
 	ihk_mc_unmap_memory(NULL, pbuf, r->count);