hfsplus: use atomic bitops for the superblock flags

The flags in the HFS+-specific superlock do get modified during runtime,
use atomic bitops to make the modifications SMP safe.

Signed-off-by: Christoph Hellwig <hch@tuxera.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/fs/hfsplus/unicode.c b/fs/hfsplus/unicode.c
index a15fcffce74f..b66d67de882c 100644
--- a/fs/hfsplus/unicode.c
+++ b/fs/hfsplus/unicode.c
@@ -132,7 +132,7 @@ int hfsplus_uni2asc(struct super_block *sb, const struct hfsplus_unistr *ustr, c
         ustrlen = be16_to_cpu(ustr->length);
         len = *len_p;
         ce1 = NULL;
-        compose = !(HFSPLUS_SB(sb)->flags & HFSPLUS_SB_NODECOMPOSE);
+        compose = !test_bit(HFSPLUS_SB_NODECOMPOSE, &HFSPLUS_SB(sb)->flags);
 
         while (ustrlen > 0) {
                 c0 = be16_to_cpu(*ip++);
@@ -293,7 +293,7 @@ int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr,
         u16 *dstr, outlen = 0;
         wchar_t c;
 
-        decompose = !(HFSPLUS_SB(sb)->flags & HFSPLUS_SB_NODECOMPOSE);
+        decompose = !test_bit(HFSPLUS_SB_NODECOMPOSE, &HFSPLUS_SB(sb)->flags);
         while (outlen < HFSPLUS_MAX_STRLEN && len > 0) {
                 size = asc2unichar(sb, astr, len, &c);
 
@@ -330,8 +330,8 @@ int hfsplus_hash_dentry(struct dentry *dentry, struct qstr *str)
         wchar_t c;
         u16 c2;
 
-        casefold = (HFSPLUS_SB(sb)->flags & HFSPLUS_SB_CASEFOLD);
-        decompose = !(HFSPLUS_SB(sb)->flags & HFSPLUS_SB_NODECOMPOSE);
+        casefold = test_bit(HFSPLUS_SB_CASEFOLD, &HFSPLUS_SB(sb)->flags);
+        decompose = !test_bit(HFSPLUS_SB_NODECOMPOSE, &HFSPLUS_SB(sb)->flags);
         hash = init_name_hash();
         astr = str->name;
         len = str->len;
@@ -373,8 +373,8 @@ int hfsplus_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr *
         u16 c1, c2;
         wchar_t c;
 
-        casefold = (HFSPLUS_SB(sb)->flags & HFSPLUS_SB_CASEFOLD);
-        decompose = !(HFSPLUS_SB(sb)->flags & HFSPLUS_SB_NODECOMPOSE);
+        casefold = test_bit(HFSPLUS_SB_CASEFOLD, &HFSPLUS_SB(sb)->flags);
+        decompose = !test_bit(HFSPLUS_SB_NODECOMPOSE, &HFSPLUS_SB(sb)->flags);
         astr1 = s1->name;
         len1 = s1->len;
         astr2 = s2->name;