Patch "cpufreq: amd-pstate-ut: Remove module parameter access" has been added to the 6.5-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    cpufreq: amd-pstate-ut: Remove module parameter access

to the 6.5-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     cpufreq-amd-pstate-ut-remove-module-parameter-access.patch
and it can be found in the queue-6.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 003034ba27ceb5004d3a0065d2d933698d26177f
Author: Swapnil Sapkal <swapnil.sapkal@xxxxxxx>
Date:   Fri Aug 18 11:44:51 2023 +0000

    cpufreq: amd-pstate-ut: Remove module parameter access
    
    [ Upstream commit 8d6e5e8268e89979d86501dbb8385ce2e6154de1 ]
    
    In amd-pstate-ut, shared memory-based systems call
    get_shared_mem() as part of amd_pstate_ut_check_enabled()
    function. This function was written when CONFIG_X86_AMD_PSTATE
    was tristate config and amd_pstate can be built as a module.
    
    Currently CONFIG_X86_AMD_PSTATE is a boolean config and module
    parameter shared_mem is removed. But amd-pstate-ut code still
    accesses this module parameter. Remove those accesses.
    
    Fixes: 456ca88d8a52 ("cpufreq: amd-pstate: change amd-pstate driver to be built-in type")
    Reviewed-by: Mario Limonciello <mario.limonciello@xxxxxxx>
    Reviewed-by: Meng Li <li.meng@xxxxxxx>
    Reviewed-by: Wyes Karny <wyes.karny@xxxxxxx>
    Suggested-by: Wyes Karny <wyes.karny@xxxxxxx>
    Signed-off-by: Swapnil Sapkal <swapnil.sapkal@xxxxxxx>
    [ rjw: Subject edits ]
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/cpufreq/amd-pstate-ut.c b/drivers/cpufreq/amd-pstate-ut.c
index 7f3fe20489818..cf07ee77d3ccf 100644
--- a/drivers/cpufreq/amd-pstate-ut.c
+++ b/drivers/cpufreq/amd-pstate-ut.c
@@ -64,27 +64,9 @@ static struct amd_pstate_ut_struct amd_pstate_ut_cases[] = {
 static bool get_shared_mem(void)
 {
 	bool result = false;
-	char path[] = "/sys/module/amd_pstate/parameters/shared_mem";
-	char buf[5] = {0};
-	struct file *filp = NULL;
-	loff_t pos = 0;
-	ssize_t ret;
-
-	if (!boot_cpu_has(X86_FEATURE_CPPC)) {
-		filp = filp_open(path, O_RDONLY, 0);
-		if (IS_ERR(filp))
-			pr_err("%s unable to open %s file!\n", __func__, path);
-		else {
-			ret = kernel_read(filp, &buf, sizeof(buf), &pos);
-			if (ret < 0)
-				pr_err("%s read %s file fail ret=%ld!\n",
-					__func__, path, (long)ret);
-			filp_close(filp, NULL);
-		}
 
-		if ('Y' == *buf)
-			result = true;
-	}
+	if (!boot_cpu_has(X86_FEATURE_CPPC))
+		result = true;
 
 	return result;
 }