[U-Boot] fat.c:707: warning: array subscript is above array bounds

Hello,

building U-Boot with recent toolchains (like GCC-4.3.2) results in this warning:

fat.c: In function 'read_bootsectandvi': fat.c:707: warning: array subscript is above array bounds

The respective code looks like this:

fs/fat/fat.c:

705 /* Terminate fs_type string. Writing past the end of vistart 706 is ok - it's just the buffer. */ 707 vistart->fs_type[8] = '\0';

fs_type[] is declared in "include/fat.h":

143 typedef struct volume_info 144 { 145 __u8 drive_number; /* BIOS drive number */ 146 __u8 reserved; /* Unused */ 147 __u8 ext_boot_sign; /* 0x29 if fields below exist (DOS 3.3+) */ 148 __u8 volume_id[4]; /* Volume ID number */ 149 char volume_label[11]; /* Volume label */ 150 char fs_type[8]; /* Typically FAT12, FAT16, or FAT32 */ 151 /* Boot code comes next, all but 2 bytes to fill up sector */ 152 /* Boot sign comes last, 2 bytes */ 153 } volume_info;

So the comment in fs/fat/fat.c is actually correct, writing beyond the end of the string is indeed uncritical here, but it is definitely not really nice either.

I want to get rid of this warning message.

Any ideas how to deal with this?

Best regards,

Wolfgang Denk