github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-28 09:04:39 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

powerpc: Add kconfig option for the systemcfg page

Browse Source 
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
This commit is contained in:
Thomas Weißschuh 2024-10-10 09:01:27 +02:00 committed by Thomas Gleixner
parent e07359f171
commit c22c06b4cc
2 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/powerpc/Kconfig
View File

@ -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

4
arch/powerpc/kernel/proc_powerpc.c
View File

@ -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