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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2015-08-13 13:44:34 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-08-19 10:39:54 +0200 |
| commit | cabc4abe8e368d754805691b146f31f574533cfa (patch) | |
| tree | cfa9c771c327b1cb1ac5014b439a7ae30ed9d275 /arch/s390 | |
| parent | 92d6289105d134582094eede00192bd66f54905f (diff) | |
| download | linux-cabc4abe8e368d754805691b146f31f574533cfa.tar.bz2 | |
s390/uaccess: remove uaccess_primary kernel parameter
get_user() and put_user() are inline functions in the meantime
again. Both will generate the mvcos instruction if compiled
with -march=z10 (or greater).
The kernel parameter "uaccess_primary" can only change the behavior
of out-of-line uaccess functions like copy_from_user() to not use
the mvcos instruction, but not for the above named inlined functions.
Therefore it is quite useless and the parameter can be removed.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/lib/uaccess.c | 15 |
1 files changed, 1 insertions, 14 deletions
diff --git a/arch/s390/lib/uaccess.c b/arch/s390/lib/uaccess.c index 4614d415bb58..0d002a746bec 100644 --- a/arch/s390/lib/uaccess.c +++ b/arch/s390/lib/uaccess.c @@ -370,22 +370,9 @@ long __strncpy_from_user(char *dst, const char __user *src, long size) } EXPORT_SYMBOL(__strncpy_from_user); -/* - * The "old" uaccess variant without mvcos can be enforced with the - * uaccess_primary kernel parameter. This is mainly for debugging purposes. - */ -static int uaccess_primary __initdata; - -static int __init parse_uaccess_pt(char *__unused) -{ - uaccess_primary = 1; - return 0; -} -early_param("uaccess_primary", parse_uaccess_pt); - static int __init uaccess_init(void) { - if (!uaccess_primary && test_facility(27)) + if (test_facility(27)) static_key_slow_inc(&have_mvcos); return 0; } |