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[PATCH 2/2] proc: switch inode number allocation to IDA

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proc doesn't use "associate pointer with id" feature of IDR, so switch
to IDA.

NOTE, NOTE, NOTE:
	Do not apply if release_inode_number() still mantions MAX_ID_MASK!

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Alexey Dobriyan 2008-07-26 11:21:37 +04:00 committed by Al Viro
parent 67935df49d
commit 9a18540915
1 changed files with 5 additions and 5 deletions
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10
fs/proc/generic.c
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@ -300,7 +300,7 @@ static int xlate_proc_name(const char *name,
return rtn;
}
static DEFINE_IDR(proc_inum_idr);
static DEFINE_IDA(proc_inum_ida);
static DEFINE_SPINLOCK(proc_inum_lock); /* protects the above */
#define PROC_DYNAMIC_FIRST 0xF0000000U
@ -315,11 +315,11 @@ static unsigned int get_inode_number(void)
int error;
retry:
if (idr_pre_get(&proc_inum_idr, GFP_KERNEL) == 0)
if (ida_pre_get(&proc_inum_ida, GFP_KERNEL) == 0)
return 0;
spin_lock(&proc_inum_lock);
error = idr_get_new(&proc_inum_idr, NULL, &i);
error = ida_get_new(&proc_inum_ida, &i);
spin_unlock(&proc_inum_lock);
if (error == -EAGAIN)
goto retry;
@ -328,7 +328,7 @@ static unsigned int get_inode_number(void)
if (i > UINT_MAX - PROC_DYNAMIC_FIRST) {
spin_lock(&proc_inum_lock);
idr_remove(&proc_inum_idr, i);
ida_remove(&proc_inum_ida, i);
spin_unlock(&proc_inum_lock);
}
return PROC_DYNAMIC_FIRST + i;
@ -337,7 +337,7 @@ static unsigned int get_inode_number(void)
static void release_inode_number(unsigned int inum)
{
spin_lock(&proc_inum_lock);
idr_remove(&proc_inum_idr, inum - PROC_DYNAMIC_FIRST);
ida_remove(&proc_inum_ida, inum - PROC_DYNAMIC_FIRST);
spin_unlock(&proc_inum_lock);
}