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

[Wolfgang Denk]

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

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