fsck_minix,mkfs_minix: fix "strict-aliasing" warnings

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

2 files changed, 13 insertions, 7 deletions

diff --git a/util-linux/fsck_minix.c b/util-linux/fsck_minix.c
index 608048983..c4612f251 100644
--- a/util-linux/fsck_minix.c
+++ b/util-linux/fsck_minix.c
@@ -173,7 +173,10 @@ struct globals {
 
         /* Bigger stuff */
         struct termios sv_termios;
-        char superblock_buffer[BLOCK_SIZE];
+        union {
+                char superblock_buffer[BLOCK_SIZE];
+                struct minix_superblock Super;
+        } u;
         char add_zone_ind_blk[BLOCK_SIZE];
         char add_zone_dind_blk[BLOCK_SIZE];
         IF_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];)
@@ -207,7 +210,7 @@ struct globals {
 #define name_depth         (G.name_depth         )
 #define name_component     (G.name_component     )
 #define sv_termios         (G.sv_termios         )
-#define superblock_buffer  (G.superblock_buffer )
+#define superblock_buffer  (G.u.superblock_buffer)
 #define add_zone_ind_blk   (G.add_zone_ind_blk   )
 #define add_zone_dind_blk  (G.add_zone_dind_blk  )
 #define add_zone_tind_blk  (G.add_zone_tind_blk  )
@@ -247,7 +250,7 @@ enum {
 #define Inode1 (((struct minix1_inode *) inode_buffer)-1)
 #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
 
-#define Super (*(struct minix_superblock *)(superblock_buffer))
+#define Super (G.u.Super)
 
 #if ENABLE_FEATURE_MINIX2
 # define ZONES    ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
diff --git a/util-linux/mkfs_minix.c b/util-linux/mkfs_minix.c
index 88647e9d8..69dfcd123 100644
--- a/util-linux/mkfs_minix.c
+++ b/util-linux/mkfs_minix.c
@@ -142,7 +142,10 @@ struct globals {
         unsigned currently_testing;
 
         char root_block[BLOCK_SIZE];
-        char superblock_buffer[BLOCK_SIZE];
+        union {
+                char superblock_buffer[BLOCK_SIZE];
+                struct minix_superblock SB;
+        } u;
         char boot_block_buffer[512];
         unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
         /* check_blocks(): buffer[] was the biggest static in entire bbox */
@@ -166,7 +169,7 @@ static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
 #define INODE_BUF1              (((struct minix1_inode*)G.inode_buffer) - 1)
 #define INODE_BUF2              (((struct minix2_inode*)G.inode_buffer) - 1)
 
-#define SB                      (*(struct minix_superblock*)G.superblock_buffer)
+#define SB                      (G.u.SB)
 
 #define SB_INODES               (SB.s_ninodes)
 #define SB_IMAPS                (SB.s_imap_blocks)
@@ -234,7 +237,7 @@ static void write_tables(void)
         xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
 
         msg_eol = "can't write superblock";
-        xwrite(dev_fd, G.superblock_buffer, BLOCK_SIZE);
+        xwrite(dev_fd, G.u.superblock_buffer, BLOCK_SIZE);
 
         msg_eol = "can't write inode map";
         xwrite(dev_fd, G.inode_map, SB_IMAPS * BLOCK_SIZE);
@@ -541,7 +544,7 @@ static void setup_tables(void)
         unsigned sb_zmaps;
         unsigned i;
 
-        /* memset(G.superblock_buffer, 0, BLOCK_SIZE); */
+        /* memset(G.u.superblock_buffer, 0, BLOCK_SIZE); */
         /* memset(G.boot_block_buffer, 0, 512); */
         SB_MAGIC = G.magic;
         SB_ZONE_SIZE = 0;