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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2017-11-02 12:51:45 +0100 |
|---|---|---|
| committer | Heiko Carstens <heiko.carstens@de.ibm.com> | 2017-11-08 09:47:54 +0100 |
| commit | 978fa72e82e375764e6e31e7a721408c5186918f (patch) | |
| tree | 97daef99cbf741988930e3dfff70081bbdeeb808 /arch/s390/mm/vmem.c | |
| parent | f44fa88745eda1530083b361e300e1ca4e15a6c5 (diff) | |
s390: remove named saved segment support
Remove the support to create a z/VM named saved segment (NSS). This
feature is not supported since quite a while in favour of jump labels,
function tracing and (now) CPU alternatives. All of these features
require to write to the kernel text section which is not possible if
the kernel is contained within an NSS.
Given that memory savings are minimal if kernel images are shared and
in addition updates of shared images are painful, the NSS feature can
be removed.
Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'arch/s390/mm/vmem.c')
| -rw-r--r-- | arch/s390/mm/vmem.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index 2e84977796a2..f890f2ad951b 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -406,13 +406,13 @@ void __init vmem_map_init(void) (_etext - _stext) >> PAGE_SHIFT, SET_MEMORY_RO | SET_MEMORY_X); __set_memory((unsigned long) _etext, - (_eshared - _etext) >> PAGE_SHIFT, + (__end_rodata - _etext) >> PAGE_SHIFT, SET_MEMORY_RO); __set_memory((unsigned long) _sinittext, (_einittext - _sinittext) >> PAGE_SHIFT, SET_MEMORY_RO | SET_MEMORY_X); pr_info("Write protected kernel read-only data: %luk\n", - (_eshared - _stext) >> 10); + (__end_rodata - _stext) >> 10); } /* |