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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/kernel/suspend.c | |
| parent | s390/archrandom: Reconsider s390 arch random implementation (diff) | |
| download | linux-dev-978fa72e82e375764e6e31e7a721408c5186918f.tar.xz linux-dev-978fa72e82e375764e6e31e7a721408c5186918f.zip | |
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/kernel/suspend.c')
| -rw-r--r-- | arch/s390/kernel/suspend.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/s390/kernel/suspend.c b/arch/s390/kernel/suspend.c index c8ea715bfe10..af0553111be8 100644 --- a/arch/s390/kernel/suspend.c +++ b/arch/s390/kernel/suspend.c @@ -152,7 +152,7 @@ int pfn_is_nosave(unsigned long pfn) { unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin)); unsigned long nosave_end_pfn = PFN_DOWN(__pa(&__nosave_end)); - unsigned long eshared_pfn = PFN_DOWN(__pa(&_eshared)) - 1; + unsigned long end_rodata_pfn = PFN_DOWN(__pa(&__end_rodata)) - 1; unsigned long stext_pfn = PFN_DOWN(__pa(&_stext)); /* Always save lowcore pages (LC protection might be enabled). */ @@ -160,9 +160,9 @@ int pfn_is_nosave(unsigned long pfn) return 0; if (pfn >= nosave_begin_pfn && pfn < nosave_end_pfn) return 1; - /* Skip memory holes and read-only pages (NSS, DCSS, ...). */ - if (pfn >= stext_pfn && pfn <= eshared_pfn) - return ipl_info.type == IPL_TYPE_NSS ? 1 : 0; + /* Skip memory holes and read-only pages (DCSS, ...). */ + if (pfn >= stext_pfn && pfn <= end_rodata_pfn) + return 0; if (tprot(PFN_PHYS(pfn))) return 1; return 0; |