diff options
| author | Thomas Weißschuh <thomas.weissschuh@linutronix.de> | 2024-10-10 09:01:27 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-11-02 12:37:35 +0100 |
| commit | c22c06b4cc3a7434f36dac9310604be3ebc6f4f9 (patch) | |
| tree | 4698ce9ce04d0241fef5ef99fbf87a54dd386cf5 /arch/powerpc | |
| parent | e07359f171f2440f4dbc98339b10c8c3cdd48a20 (diff) | |
powerpc: Add kconfig option for the systemcfg page
The systemcfg page through procfs is only a backwards-compatible
interface for very old applications.
Make it possible to be disabled.
This also creates a convenient config #define to guard any accesses to
the systemcfg page.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20241010-vdso-generic-base-v1-25-b64f0842d512@linutronix.de
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/Kconfig | 8 | ||||
| -rw-r--r-- | arch/powerpc/kernel/proc_powerpc.c | 4 |
2 files changed, 10 insertions, 2 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 8094a01974cc..5d348e1f09d7 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -1298,6 +1298,14 @@ config MODULES_SIZE endmenu +config PPC64_PROC_SYSTEMCFG + def_bool y + depends on PPC64 && PROC_FS + help + This option enables the presence of /proc/ppc64/systemcfg through + which the systemcfg page can be accessed. + This interface only exists for backwards-compatibility. + if PPC64 # This value must have zeroes in the bottom 60 bits otherwise lots will break config PAGE_OFFSET diff --git a/arch/powerpc/kernel/proc_powerpc.c b/arch/powerpc/kernel/proc_powerpc.c index 910d2082e05f..3bda365843e4 100644 --- a/arch/powerpc/kernel/proc_powerpc.c +++ b/arch/powerpc/kernel/proc_powerpc.c @@ -14,7 +14,7 @@ #include <asm/rtas.h> #include <linux/uaccess.h> -#ifdef CONFIG_PPC64 +#ifdef CONFIG_PPC64_PROC_SYSTEMCFG static loff_t page_map_seek(struct file *file, loff_t off, int whence) { @@ -59,7 +59,7 @@ static int __init proc_ppc64_init(void) } __initcall(proc_ppc64_init); -#endif /* CONFIG_PPC64 */ +#endif /* CONFIG_PPC64_PROC_SYSTEMCFG */ /* * Create the ppc64 and ppc64/rtas directories early. This allows us to |