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x86/mm: Fix function name typo in pmd_read_atomic() comment

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The function involved should be pte_offset_map_lock() and we never have
function pmd_offset_map_lock defined.

Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190925014453.20236-1-richardw.yang@linux.intel.com
[ Minor edits. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Wei Yang 2019-09-25 09:44:53 +08:00 • committed by Ingo Molnar
parent 77df779de7
commit a2f7a0bfca
1 changed files with 2 additions and 2 deletions
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4
arch/x86/include/asm/pgtable-3level.h
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@ -44,10 +44,10 @@ static inline void native_set_pte(pte_t *ptep, pte_t pte)
* pmd_populate rightfully does a set_64bit, but if we're reading the
* pmd_t with a "*pmdp" on the mincore side, a SMP race can happen
* because gcc will not read the 64bit of the pmd atomically. To fix
* this all places running pmd_offset_map_lock() while holding the
* this all places running pte_offset_map_lock() while holding the
* mmap_sem in read mode, shall read the pmdp pointer using this
* function to know if the pmd is null nor not, and in turn to know if
* they can run pmd_offset_map_lock or pmd_trans_huge or other pmd
* they can run pte_offset_map_lock() or pmd_trans_huge() or other pmd
* operations.
*
* Without THP if the mmap_sem is hold for reading, the pmd can only