linux-kernel - [PATCH RESEND 3/3] proc: Remove usage of the deprecated ida_simple

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Date: Sat,  8 Jun 2024 16:34:20 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: jk@...abs.org,
	joel@....id.au,
	alistair@...ple.id.au,
	eajames@...ux.ibm.com,
	parthiban.veerasooran@...rochip.com,
	christian.gromm@...rochip.com,
	willy@...radead.org,
	akpm@...ux-foundation.org
Cc: linux-fsi@...ts.ozlabs.org,
	linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH RESEND 3/3] proc: Remove usage of the deprecated ida_simple_xx() API

ida_alloc() and ida_free() should be preferred to the deprecated
ida_simple_get() and ida_simple_remove().

Note that the upper limit of ida_simple_get() is exclusive, but the one of
ida_alloc_max() is inclusive. So a -1 has been added when needed.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Reviewed-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
This patch has been sent about 5 months ago [1] and has been A-by just a
few minutes after.

A gentle reminder has been sent 3 months later [2].

However, it has still not reached -next since then in the last 2 months.

So, I've added the R-b tag and I'm adding Andrew Morton in To:, in order to
help in the merge process.

Thanks
CJ

[1]: https://lore.kernel.org/all/f235bd25763bd530ff5508084989f63e020c3606.1705341186.git.christophe.jaillet@wanadoo.fr/
[2]: https://lore.kernel.org/all/24c05525-05f7-48bb-bf74-945cf55d3477@wanadoo.fr/
---
 fs/proc/generic.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 775ce0bcf08c..c02f1e63f82d 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -202,8 +202,8 @@ int proc_alloc_inum(unsigned int *inum)
 {
 	int i;
 
-	i = ida_simple_get(&proc_inum_ida, 0, UINT_MAX - PROC_DYNAMIC_FIRST + 1,
-			   GFP_KERNEL);
+	i = ida_alloc_max(&proc_inum_ida, UINT_MAX - PROC_DYNAMIC_FIRST,
+			  GFP_KERNEL);
 	if (i < 0)
 		return i;
 
@@ -213,7 +213,7 @@ int proc_alloc_inum(unsigned int *inum)
 
 void proc_free_inum(unsigned int inum)
 {
-	ida_simple_remove(&proc_inum_ida, inum - PROC_DYNAMIC_FIRST);
+	ida_free(&proc_inum_ida, inum - PROC_DYNAMIC_FIRST);
 }
 
 static int proc_misc_d_revalidate(struct dentry *dentry, unsigned int flags)
-- 
2.45.2