From 4e0ef3a68c8dab5ef71fe66ce4bd3dc555cfda82 Mon Sep 17 00:00:00 2001
From: Pavel Charvat <pchar@ucw.cz>
Date: Mon, 12 Feb 2018 18:33:27 +0100
Subject: [PATCH] Main blockio: Added const keyword to block_io_write().

---
 ucw/main-block.c | 2 +-
 ucw/mainloop.h   | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/ucw/main-block.c b/ucw/main-block.c
index 9efd8a27..6093984a 100644
--- a/ucw/main-block.c
+++ b/ucw/main-block.c
@@ -114,7 +114,7 @@ block_io_read(struct main_block_io *bio, void *buf, uint len)
 }
 
 void
-block_io_write(struct main_block_io *bio, void *buf, uint len)
+block_io_write(struct main_block_io *bio, const void *buf, uint len)
 {
   ASSERT(bio->file.n.next);
   if (len)
diff --git a/ucw/mainloop.h b/ucw/mainloop.h
index 03ebec6e..98722e59 100644
--- a/ucw/mainloop.h
+++ b/ucw/mainloop.h
@@ -422,7 +422,7 @@ struct main_block_io {
   struct main_file file;
   byte *rbuf;					/* Read/write pointers for use by file_read/write */
   uint rpos, rlen;
-  byte *wbuf;
+  const byte *wbuf;
   uint wpos, wlen;
   void (*read_done)(struct main_block_io *bio);	/* [*] Called when file_read is finished; rpos < rlen if EOF */
   void (*write_done)(struct main_block_io *bio);	/* [*] Called when file_write is finished */
@@ -475,7 +475,7 @@ void block_io_read(struct main_block_io *bio, void *buf, uint len);
  * If you call it with zero @len, it will cancel the previous write, but note
  * that some data may already be written.
  **/
-void block_io_write(struct main_block_io *bio, void *buf, uint len);
+void block_io_write(struct main_block_io *bio, const void *buf, uint len);
 
 /**
  * Sets a timer for a file @bio. If the timer is not overwritten or disabled
-- 
2.39.5