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author | Heiko Carstens <hca@linux.ibm.com> | 2023-08-25 15:29:53 +0300 |
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committer | Heiko Carstens <hca@linux.ibm.com> | 2023-08-30 12:03:28 +0300 |
commit | a7eb28801b692df2496e21ff9af6ab0dc1969133 (patch) | |
tree | 567ad596b5fe74d42c24731db0bccc5c4856224c /arch/s390/mm/init.c | |
parent | 850612c8e4fb048905af597cbd25dfbb40d9ffdf (diff) | |
download | linux-a7eb28801b692df2496e21ff9af6ab0dc1969133.tar.xz |
s390/mm: use __set_memory() variants where useful
Use the __set_memory_yy() variants instead of set_memory_yy() where
useful. This allows to make the code a bit more readable.
This also fixes the debug pagealloc case, where set_memory_4k() might be
called for an area larger than 8TB which would lead to an overflow of
the num_pages parameter of set_memory_4k().
However RELOC_HIDE() has to be used for the __set_memory_4k() case for
the time being, to avoid compiler warnings because of performing pointer
arithmetic on a NULL pointer, which has undefined behavior. This happens
because __va(0) always translates to NULL. However this will change, and
as soon as this happens the RELOC_HIDE() hack can be removed again.
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/mm/init.c')
-rw-r--r-- | arch/s390/mm/init.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index 8d94e29adcdb..d1631f8e53b5 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -107,7 +107,7 @@ void mark_rodata_ro(void) { unsigned long size = __end_ro_after_init - __start_ro_after_init; - set_memory_ro((unsigned long)__start_ro_after_init, size >> PAGE_SHIFT); + __set_memory_ro(__start_ro_after_init, __end_ro_after_init); pr_info("Write protected read-only-after-init data: %luk\n", size >> 10); debug_checkwx(); } |