日志里出现这个，是咋回事啊

shortree

官改1.8，日志里出现下面的内容，是咋回事呀，不会是闪存有问题了吧
Thu Jan  1 08:00:28 1970 kern.notice kernel: [   27.336000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000000: 0x0527 instead
Thu Jan  1 08:00:28 1970 kern.notice kernel: [   27.356000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000004: 0x2159 instead
Thu Jan  1 08:00:28 1970 kern.notice kernel: [   27.372000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000008: 0xc05b instead
Thu Jan  1 08:00:28 1970 kern.notice kernel: [   27.392000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000000c: 0x9900 instead
Thu Jan  1 08:00:28 1970 kern.notice kernel: [   27.412000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000010: 0x0080 instead
Thu Jan  1 08:00:28 1970 kern.notice kernel: [   27.432000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000014: 0x2e80 instead
Thu Jan  1 08:00:28 1970 kern.notice kernel: [   27.448000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000018: 0x7fa8 instead
Thu Jan  1 08:00:28 1970 kern.notice kernel: [   27.468000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000001c: 0x0505 instead
Thu Jan  1 08:00:28 1970 kern.notice kernel: [   27.488000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000020: 0x0403 instead
Thu Jan  1 08:00:28 1970 kern.notice kernel: [   27.504000] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000024: 0x324b instead
Thu Jan  1 08:00:28 1970 kern.notice kernel: [   27.524000] jffs2: Further such events for this erase block will not be printed
Thu Jan  1 08:00:28 1970 kern.warn kernel: [   27.572000] jffs2: Old JFFS2 bitmask found at 0x0000cce4
Thu Jan  1 08:00:28 1970 kern.warn kernel: [   27.580000] jffs2: You cannot use older JFFS2 filesystems with newer kernels