diff options
| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2020-03-18 20:55:24 +0100 |
|---|---|---|
| committer |   Vasily Gorbik <gor@linux.ibm.com> | 2020-03-23 13:41:55 +0100 |
| commit | 394216275c7d503d966317da9a01ad6626a6091d (patch) | |
| tree | 7babb0a4ee063a29e9f4cc7c1fd8bec20caabeb5 /arch/s390/mm/pageattr.c | |
| parent | s390/cpuinfo: do not skip info for CPUs without MHz feature (diff) | |
| download | linux-dev-394216275c7d503d966317da9a01ad6626a6091d.tar.xz linux-dev-394216275c7d503d966317da9a01ad6626a6091d.zip | |
s390: remove broken hibernate / power management support
Hibernation is known to be broken for many years on s390. Given that
there aren't any real use cases, remove the code instead of spending
time to fix and maintain it.
Without hibernate support it doesn't make too much sense to keep power
management support; therefore remove it completely.
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/mm/pageattr.c')
| -rw-r--r-- | arch/s390/mm/pageattr.c | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c index f8c6faab41f4..e22c06d5f206 100644 --- a/arch/s390/mm/pageattr.c +++ b/arch/s390/mm/pageattr.c @@ -367,20 +367,4 @@ void __kernel_map_pages(struct page *page, int numpages, int enable) } } -#ifdef CONFIG_HIBERNATION -bool kernel_page_present(struct page *page) -{ - unsigned long addr; - int cc; - - addr = page_to_phys(page); - asm volatile( - " lra %1,0(%1)\n" - " ipm %0\n" - " srl %0,28" - : "=d" (cc), "+a" (addr) : : "cc"); - return cc == 0; -} -#endif /* CONFIG_HIBERNATION */ - #endif /* CONFIG_DEBUG_PAGEALLOC */ |