linux-kernel - [PATCH] proc: fix casts to/from restricted fmode

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Message-ID: <20240922103831.130355-1-minhuadotchen@gmail.com>
Date: Sun, 22 Sep 2024 18:38:29 +0800
From: Min-Hua Chen <minhuadotchen@...il.com>
To: 
Cc: Min-Hua Chen <minhuadotchen@...il.com>,
	linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: [PATCH] proc: fix casts to/from restricted fmode_t

Peform a __force cast to fix the following sparse warnings:

fs/proc/base.c:2320:25: sparse: warning: cast to restricted fmode_t
fs/proc/base.c:2377:42: sparse: warning: cast from restricted fmode_t
fs/proc/base.c:2477:48: sparse: warning: cast from restricted fmode_t

No functional changes intended.

Signed-off-by: Min-Hua Chen <minhuadotchen@...il.com>
---
 fs/proc/base.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/proc/base.c b/fs/proc/base.c
index b31283d81c52..cb32961dfb4a 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2317,7 +2317,7 @@ static struct dentry *
 proc_map_files_instantiate(struct dentry *dentry,
 			   struct task_struct *task, const void *ptr)
 {
-	fmode_t mode = (fmode_t)(unsigned long)ptr;
+	fmode_t mode = (__force fmode_t)(unsigned long)ptr;
 	struct proc_inode *ei;
 	struct inode *inode;
 
@@ -2374,7 +2374,7 @@ static struct dentry *proc_map_files_lookup(struct inode *dir,
 
 	if (vma->vm_file)
 		result = proc_map_files_instantiate(dentry, task,
-				(void *)(unsigned long)vma->vm_file->f_mode);
+				(void *)(__force unsigned long)vma->vm_file->f_mode);
 
 out_no_vma:
 	mmap_read_unlock(mm);
@@ -2474,7 +2474,7 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
 				      buf, len,
 				      proc_map_files_instantiate,
 				      task,
-				      (void *)(unsigned long)p->mode))
+				      (void *)(__force unsigned long)p->mode))
 			break;
 		ctx->pos++;
 	}
-- 
2.43.0