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s390: Optimize __pa/__va when RANDOMIZE_IDENTITY_BASE is off

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Use a zero identity base when CONFIG_RANDOMIZE_IDENTITY_BASE is off,
slightly optimizing __pa/__va calculations.

Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Vasily Gorbik
2024-12-11 12:29:40 +01:00
committed by Alexander Gordeev
parent 9af310ef10
commit d7bebcb4a8
3 changed files with 8 additions and 3 deletions
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4
arch/s390/include/asm/page.h
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@@ -184,7 +184,11 @@ extern struct vm_layout vm_layout;
#define __kaslr_offset vm_layout.kaslr_offset
#define __kaslr_offset_phys vm_layout.kaslr_offset_phys
#ifdef CONFIG_RANDOMIZE_IDENTITY_BASE
#define __identity_base vm_layout.identity_base
#else
#define __identity_base 0UL
#endif
#define ident_map_size vm_layout.identity_size
static inline unsigned long kaslr_offset(void)