The patch titled
Subject: fs/proc/generic.c: switch to ida_simple_get/remove
has been added to the -mm tree. Its filename is
fs-proc-switch-to-ida_simple_get-remove.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/fs-proc-switch-to-ida_simple_get-remove.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/fs-proc-switch-to-ida_simple_get-remove.patch
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------------------------------------------------------
From: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Subject: fs/proc/generic.c: switch to ida_simple_get/remove
The code can be much simplified by switching to ida_simple_get/remove.
Link: http://lkml.kernel.org/r/8d1cc9f7-5115-c9dc-028e-c0770b6bfe1f@xxxxxxxxx
Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/generic.c | 34 ++++++++--------------------------
1 file changed, 8 insertions(+), 26 deletions(-)
diff -puN fs/proc/generic.c~fs-proc-switch-to-ida_simple_get-remove fs/proc/generic.c
--- a/fs/proc/generic.c~fs-proc-switch-to-ida_simple_get-remove
+++ a/fs/proc/generic.c
@@ -180,7 +180,6 @@ static int xlate_proc_name(const char *n
}
static DEFINE_IDA(proc_inum_ida);
-static DEFINE_SPINLOCK(proc_inum_lock); /* protects the above */
#define PROC_DYNAMIC_FIRST 0xF0000000U
@@ -190,37 +189,20 @@ static DEFINE_SPINLOCK(proc_inum_lock);
*/
int proc_alloc_inum(unsigned int *inum)
{
- unsigned int i;
- int error;
+ int i;
-retry:
- if (!ida_pre_get(&proc_inum_ida, GFP_KERNEL))
- return -ENOMEM;
-
- spin_lock_irq(&proc_inum_lock);
- error = ida_get_new(&proc_inum_ida, &i);
- spin_unlock_irq(&proc_inum_lock);
- if (error == -EAGAIN)
- goto retry;
- else if (error)
- return error;
-
- if (i > UINT_MAX - PROC_DYNAMIC_FIRST) {
- spin_lock_irq(&proc_inum_lock);
- ida_remove(&proc_inum_ida, i);
- spin_unlock_irq(&proc_inum_lock);
- return -ENOSPC;
- }
- *inum = PROC_DYNAMIC_FIRST + i;
+ i = ida_simple_get(&proc_inum_ida, 0, UINT_MAX - PROC_DYNAMIC_FIRST + 1,
+ GFP_KERNEL);
+ if (i < 0)
+ return i;
+
+ *inum = PROC_DYNAMIC_FIRST + (unsigned int)i;
return 0;
}
void proc_free_inum(unsigned int inum)
{
- unsigned long flags;
- spin_lock_irqsave(&proc_inum_lock, flags);
- ida_remove(&proc_inum_ida, inum - PROC_DYNAMIC_FIRST);
- spin_unlock_irqrestore(&proc_inum_lock, flags);
+ ida_simple_remove(&proc_inum_ida, inum - PROC_DYNAMIC_FIRST);
}
/*
_
Patches currently in -mm which might be from hkallweit1@xxxxxxxxx are
fs-proc-switch-to-ida_simple_get-remove.patch
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