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x86/mm: Drop unneeded __always_inline for p4d page table helpers 

This reverts the following commits:

  1ea66554d3 ("x86/mm: Mark p4d_offset() __always_inline")
  046c0dbec0 ("x86: Mark native_set_p4d() as __always_inline")

p4d_offset(), native_set_p4d() and native_p4d_clear() were marked
__always_inline in attempt to move __pgtable_l5_enabled into __initdata
section.

It was required as KASAN initialization code is a user of
USE_EARLY_PGTABLE_L5, so all pgtable_l5_enabled() translated to
__pgtable_l5_enabled there. This includes pgtable_l5_enabled() called
from inline p4d helpers.

If compiler would decided to not inline these p4d helpers, but leave
them standalone, we end up with section mismatch.

We don't need __always_inline here anymore. __pgtable_l5_enabled moved
back to be __ro_after_init. See the following commit:

  51be133515 ("Revert "x86/mm: Mark __pgtable_l5_enabled __initdata"")

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20180626100341.49910-1-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
zero-colors
Kirill A. Shutemov 2018-06-26 13:03:41 +03:00 committed by Ingo Molnar
parent cfe1957704
commit b8c1e4293a
2 changed files with 3 additions and 3 deletions
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2
arch/x86/include/asm/pgtable.h
View File

@ -898,7 +898,7 @@ static inline unsigned long pgd_page_vaddr(pgd_t pgd)
#define pgd_page(pgd) pfn_to_page(pgd_pfn(pgd))
/* to find an entry in a page-table-directory. */
static __always_inline p4d_t *p4d_offset(pgd_t *pgd, unsigned long address)
static inline p4d_t *p4d_offset(pgd_t *pgd, unsigned long address)
{
if (!pgtable_l5_enabled())
return (p4d_t *)pgd;

4
arch/x86/include/asm/pgtable_64.h
View File

@ -216,7 +216,7 @@ static inline pgd_t pti_set_user_pgd(pgd_t *pgdp, pgd_t pgd)
}
#endif
static __always_inline void native_set_p4d(p4d_t *p4dp, p4d_t p4d)
static inline void native_set_p4d(p4d_t *p4dp, p4d_t p4d)
{
pgd_t pgd;
@ -230,7 +230,7 @@ static __always_inline void native_set_p4d(p4d_t *p4dp, p4d_t p4d)
*p4dp = native_make_p4d(native_pgd_val(pgd));
}
static __always_inline void native_p4d_clear(p4d_t *p4d)
static inline void native_p4d_clear(p4d_t *p4d)
{
native_set_p4d(p4d, native_make_p4d(0));
}