litmus-rt.git - The LITMUS^RT kernel.

The LITMUS^RT kernel.

Bjoern Brandenburg

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author	Atsushi Nemoto <anemo@mba.ocn.ne.jp>	2008-08-26 09:34:57 -0400
committer	Ralf Baechle <ralf@linux-mips.org>	2008-09-05 16:24:12 -0400
commit	0011036beeffeada15acd1936d67988de21ca65e (patch)
tree	8ec5d593f3ae0b12108e8541157fe54832c2c66c /include/linux/string_helpers.h
parent	3885ec8ca29e5e33e9a5f0ae9dc849d798634ec9 (diff)

[MIPS] Probe initrd header only if explicitly specified

Currently init_initrd() probes initrd header at the last page of kernel image, but it is valid only if addinitrd was used. If addinitrd was not used, the area contains garbage so probing there might misdetect initrd header (magic number is not strictly robust). This patch introduces CONFIG_PROBE_INITRD_HEADER to explicitly enable this probing. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Diffstat (limited to 'include/linux/string_helpers.h')

0 files changed, 0 insertions, 0 deletions

an class="hl opt">= 1; char b[BDEVNAME_SIZE]; for (blk = 0; ; blk++, put_dev_sector(sect)) { if (blk == RDB_ALLOCATION_LIMIT) goto rdb_done; data = read_dev_sector(bdev, blk, &sect); if (!data) { if (warn_no_part) printk("Dev %s: unable to read RDB block %d\n", bdevname(bdev, b), blk); res = -1; goto rdb_done; } if (*(__be32 *)data != cpu_to_be32(IDNAME_RIGIDDISK)) continue; rdb = (struct RigidDiskBlock *)data; if (checksum_block((__be32 *)data, be32_to_cpu(rdb->rdb_SummedLongs) & 0x7F) == 0) break; /* Try again with 0xdc..0xdf zeroed, Windows might have * trashed it. */ *(__be32 *)(data+0xdc) = 0; if (checksum_block((__be32 *)data, be32_to_cpu(rdb->rdb_SummedLongs) & 0x7F)==0) { printk("Warning: Trashed word at 0xd0 in block %d " "ignored in checksum calculation\n",blk); break; } printk("Dev %s: RDB in block %d has bad checksum\n", bdevname(bdev, b), blk); } /* blksize is blocks per 512 byte standard block */ blksize = be32_to_cpu( rdb->rdb_BlockBytes ) / 512; printk(" RDSK (%d)", blksize * 512); /* Be more informative */ blk = be32_to_cpu(rdb->rdb_PartitionList); put_dev_sector(sect); for (part = 1; blk>0 && part<=16; part++, put_dev_sector(sect)) { blk *= blksize; /* Read in terms partition table understands */ data = read_dev_sector(bdev, blk, &sect); if (!data) { if (warn_no_part) printk("Dev %s: unable to read partition block %d\n", bdevname(bdev, b), blk); res = -1; goto rdb_done; } pb = (struct PartitionBlock *)data; blk = be32_to_cpu(pb->pb_Next); if (pb->pb_ID != cpu_to_be32(IDNAME_PARTITION)) continue; if (checksum_block((__be32 *)pb, be32_to_cpu(pb->pb_SummedLongs) & 0x7F) != 0 ) continue; /* Tell Kernel about it */ nr_sects = (be32_to_cpu(pb->pb_Environment[10]) + 1 - be32_to_cpu(pb->pb_Environment[9])) * be32_to_cpu(pb->pb_Environment[3]) * be32_to_cpu(pb->pb_Environment[5]) * blksize; if (!nr_sects) continue; start_sect = be32_to_cpu(pb->pb_Environment[9]) * be32_to_cpu(pb->pb_Environment[3]) * be32_to_cpu(pb->pb_Environment[5]) * blksize; put_partition(state,slot++,start_sect,nr_sects); { /* Be even more informative to aid mounting */ char dostype[4]; __be32 *dt = (__be32 *)dostype; *dt = pb->pb_Environment[16]; if (dostype[3] < ' ') printk(" (%c%c%c^%c)", dostype[0], dostype[1], dostype[2], dostype[3] + '@' ); else printk(" (%c%c%c%c)", dostype[0], dostype[1], dostype[2], dostype[3]); printk("(res %d spb %d)", be32_to_cpu(pb->pb_Environment[6]), be32_to_cpu(pb->pb_Environment[4])); } res = 1; } printk("\n"); rdb_done: return res; }


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