diff options
Diffstat (limited to 'arch/parisc/kernel/sys_parisc.c')
-rw-r--r-- | arch/parisc/kernel/sys_parisc.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c index 848b0702005d..09a34b07f02e 100644 --- a/arch/parisc/kernel/sys_parisc.c +++ b/arch/parisc/kernel/sys_parisc.c @@ -465,3 +465,31 @@ asmlinkage long parisc_inotify_init1(int flags) flags = FIX_O_NONBLOCK(flags); return sys_inotify_init1(flags); } + +/* + * madvise() wrapper + * + * Up to kernel v6.1 parisc has different values than all other + * platforms for the MADV_xxx flags listed below. + * To keep binary compatibility with existing userspace programs + * translate the former values to the new values. + * + * XXX: Remove this wrapper in year 2025 (or later) + */ + +asmlinkage notrace long parisc_madvise(unsigned long start, size_t len_in, int behavior) +{ + switch (behavior) { + case 65: behavior = MADV_MERGEABLE; break; + case 66: behavior = MADV_UNMERGEABLE; break; + case 67: behavior = MADV_HUGEPAGE; break; + case 68: behavior = MADV_NOHUGEPAGE; break; + case 69: behavior = MADV_DONTDUMP; break; + case 70: behavior = MADV_DODUMP; break; + case 71: behavior = MADV_WIPEONFORK; break; + case 72: behavior = MADV_KEEPONFORK; break; + case 73: behavior = MADV_COLLAPSE; break; + } + + return sys_madvise(start, len_in, behavior); +} |