ocfs2: kill endianness abuses in blockcheck.c

ocfs2_block_check is for little-endian contents; if we just want to
its fields converted to host-endian in a couple of functions, just
put those values into local u32 and u16...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/ocfs2/blockcheck.c b/fs/ocfs2/blockcheck.c
index c7ee03c..0725e60 100644 (file)
--- a/fs/ocfs2/blockcheck.c
+++ b/fs/ocfs2/blockcheck.c
@@ -422,45 +422,46 @@ int ocfs2_block_check_validate(void *data, size_t blocksize,
                               struct ocfs2_blockcheck_stats *stats)
 {
        int rc = 0;
-       struct ocfs2_block_check check;
+       u32 bc_crc32e;
+       u16 bc_ecc;
        u32 crc, ecc;
 
        ocfs2_blockcheck_inc_check(stats);
 
-       check.bc_crc32e = le32_to_cpu(bc->bc_crc32e);
-       check.bc_ecc = le16_to_cpu(bc->bc_ecc);
+       bc_crc32e = le32_to_cpu(bc->bc_crc32e);
+       bc_ecc = le16_to_cpu(bc->bc_ecc);
 
        memset(bc, 0, sizeof(struct ocfs2_block_check));
 
        /* Fast path - if the crc32 validates, we're good to go */
        crc = crc32_le(~0, data, blocksize);
-       if (crc == check.bc_crc32e)
+       if (crc == bc_crc32e)
                goto out;
 
        ocfs2_blockcheck_inc_failure(stats);
        mlog(ML_ERROR,
             "CRC32 failed: stored: 0x%x, computed 0x%x. Applying ECC.\n",
-            (unsigned int)check.bc_crc32e, (unsigned int)crc);
+            (unsigned int)bc_crc32e, (unsigned int)crc);
 
        /* Ok, try ECC fixups */
        ecc = ocfs2_hamming_encode_block(data, blocksize);
-       ocfs2_hamming_fix_block(data, blocksize, ecc ^ check.bc_ecc);
+       ocfs2_hamming_fix_block(data, blocksize, ecc ^ bc_ecc);
 
        /* And check the crc32 again */
        crc = crc32_le(~0, data, blocksize);
-       if (crc == check.bc_crc32e) {
+       if (crc == bc_crc32e) {
                ocfs2_blockcheck_inc_recover(stats);
                goto out;
        }
 
        mlog(ML_ERROR, "Fixed CRC32 failed: stored: 0x%x, computed 0x%x\n",
-            (unsigned int)check.bc_crc32e, (unsigned int)crc);
+            (unsigned int)bc_crc32e, (unsigned int)crc);
 
        rc = -EIO;
 
 out:
-       bc->bc_crc32e = cpu_to_le32(check.bc_crc32e);
-       bc->bc_ecc = cpu_to_le16(check.bc_ecc);
+       bc->bc_crc32e = cpu_to_le32(bc_crc32e);
+       bc->bc_ecc = cpu_to_le16(bc_ecc);
 
        return rc;
 }
@@ -528,7 +529,8 @@ int ocfs2_block_check_validate_bhs(struct buffer_head **bhs, int nr,
                                   struct ocfs2_blockcheck_stats *stats)
 {
        int i, rc = 0;
-       struct ocfs2_block_check check;
+       u32 bc_crc32e;
+       u16 bc_ecc;
        u32 crc, ecc, fix;
 
        BUG_ON(nr < 0);
@@ -538,21 +540,21 @@ int ocfs2_block_check_validate_bhs(struct buffer_head **bhs, int nr,
 
        ocfs2_blockcheck_inc_check(stats);
 
-       check.bc_crc32e = le32_to_cpu(bc->bc_crc32e);
-       check.bc_ecc = le16_to_cpu(bc->bc_ecc);
+       bc_crc32e = le32_to_cpu(bc->bc_crc32e);
+       bc_ecc = le16_to_cpu(bc->bc_ecc);
 
        memset(bc, 0, sizeof(struct ocfs2_block_check));
 
        /* Fast path - if the crc32 validates, we're good to go */
        for (i = 0, crc = ~0; i < nr; i++)
                crc = crc32_le(crc, bhs[i]->b_data, bhs[i]->b_size);
-       if (crc == check.bc_crc32e)
+       if (crc == bc_crc32e)
                goto out;
 
        ocfs2_blockcheck_inc_failure(stats);
        mlog(ML_ERROR,
             "CRC32 failed: stored: %u, computed %u.  Applying ECC.\n",
-            (unsigned int)check.bc_crc32e, (unsigned int)crc);
+            (unsigned int)bc_crc32e, (unsigned int)crc);
 
        /* Ok, try ECC fixups */
        for (i = 0, ecc = 0; i < nr; i++) {
@@ -565,7 +567,7 @@ int ocfs2_block_check_validate_bhs(struct buffer_head **bhs, int nr,
                                                bhs[i]->b_size * 8,
                                                bhs[i]->b_size * 8 * i);
        }
-       fix = ecc ^ check.bc_ecc;
+       fix = ecc ^ bc_ecc;
        for (i = 0; i < nr; i++) {
                /*
                 * Try the fix against each buffer.  It will only affect
@@ -578,19 +580,19 @@ int ocfs2_block_check_validate_bhs(struct buffer_head **bhs, int nr,
        /* And check the crc32 again */
        for (i = 0, crc = ~0; i < nr; i++)
                crc = crc32_le(crc, bhs[i]->b_data, bhs[i]->b_size);
-       if (crc == check.bc_crc32e) {
+       if (crc == bc_crc32e) {
                ocfs2_blockcheck_inc_recover(stats);
                goto out;
        }
 
        mlog(ML_ERROR, "Fixed CRC32 failed: stored: %u, computed %u\n",
-            (unsigned int)check.bc_crc32e, (unsigned int)crc);
+            (unsigned int)bc_crc32e, (unsigned int)crc);
 
        rc = -EIO;
 
 out:
-       bc->bc_crc32e = cpu_to_le32(check.bc_crc32e);
-       bc->bc_ecc = cpu_to_le16(check.bc_ecc);
+       bc->bc_crc32e = cpu_to_le32(bc_crc32e);
+       bc->bc_ecc = cpu_to_le16(bc_ecc);
 
        return rc;
 }