x86/mtrr: Remove unnecessary strlen() in mtrr_write()

The local variable length already holds the string length after calling
strncpy_from_user(). Using another local variable linlen and calling
strlen() is therefore unnecessary and can be removed. Remove linlen
and strlen() and use length instead.

No change in functionality intended.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250225131621.329699-2-thorsten.blum@linux.dev

diff --git a/arch/x86/kernel/cpu/mtrr/if.c b/arch/x86/kernel/cpu/mtrr/if.c
index a5c506f6da7fa1689fcd6e8cfa96172d3721434f..4049235b1bfe4a3533c7703607fb5f0163f4d6b4 100644 (file)
--- a/arch/x86/kernel/cpu/mtrr/if.c
+++ b/arch/x86/kernel/cpu/mtrr/if.c
@@ -99,7 +99,6 @@ mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos)
        char *ptr;
        char line[LINE_SIZE];
        int length;
-       size_t linelen;
 
        memset(line, 0, LINE_SIZE);
 
@@ -108,9 +107,8 @@ mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos)
        if (length < 0)
                return length;
 
-       linelen = strlen(line);
-       ptr = line + linelen - 1;
-       if (linelen && *ptr == '\n')
+       ptr = line + length - 1;
+       if (length && *ptr == '\n')
                *ptr = '\0';
 
        if (!strncmp(line, "disable=", 8)) {