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change how d_alias is replaced by du.d_alias

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d_alias may need to be converted to du.d_alias
depending on the kernel version.
d_alias is currently in only one place in the code which
changes
"hlist_for_each_entry(dentry, &inode->i_dentry, d_alias)"
to
"hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias)"
as neccesary.

This effectively results in a double macro expansion
for code that uses the zfs headers but already has its
own macro for just d_alias (lustre in this case).

Remove the conditional code for hlist_for_each_entry
and have a macro for "d_alias -> du.d_alias" instead.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Gian-Carlo DeFazio <defazio1@llnl.gov>
Closes #14377
This commit is contained in:
Gian-Carlo DeFazio 2023-01-12 10:14:04 -08:00 committed by GitHub
parent eee9362a72
commit 80d64bb85f
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1 changed files with 4 additions and 4 deletions
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8
include/os/linux/kernel/linux/dcache_compat.h
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@ -35,6 +35,10 @@
#define d_make_root(inode) d_alloc_root(inode) #define d_make_root(inode) d_alloc_root(inode)
#endif /* HAVE_D_MAKE_ROOT */ #endif /* HAVE_D_MAKE_ROOT */
#ifdef HAVE_DENTRY_D_U_ALIASES
#define d_alias d_u.d_alias
#endif
/* /*
* 2.6.30 API change, * 2.6.30 API change,
* The const keyword was added to the 'struct dentry_operations' in * The const keyword was added to the 'struct dentry_operations' in
@ -70,11 +74,7 @@ zpl_d_drop_aliases(struct inode *inode)
{ {
struct dentry *dentry; struct dentry *dentry;
spin_lock(&inode->i_lock); spin_lock(&inode->i_lock);
#ifdef HAVE_DENTRY_D_U_ALIASES
hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) {
#else
hlist_for_each_entry(dentry, &inode->i_dentry, d_alias) { hlist_for_each_entry(dentry, &inode->i_dentry, d_alias) {
#endif
if (!IS_ROOT(dentry) && !d_mountpoint(dentry) && if (!IS_ROOT(dentry) && !d_mountpoint(dentry) &&
(dentry->d_inode == inode)) { (dentry->d_inode == inode)) {
d_drop(dentry); d_drop(dentry);