+ mmu_gather-use-macro-arguments-more-carefully.patch added to mm-hotfixes-unstable branch

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



The patch titled
     Subject: mmu_gather: Use macro arguments more carefully
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     mmu_gather-use-macro-arguments-more-carefully.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mmu_gather-use-macro-arguments-more-carefully.patch

This patch will later appear in the mm-hotfixes-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Jann Horn <jannh@xxxxxxxxxx>
Subject: mmu_gather: Use macro arguments more carefully
Date: Wed, 23 Nov 2022 17:56:50 +0100

Avoid breaking stuff when the tlb parameter is an expression like "&tlb". 
The following commit relies on this when calling pte_free_tlb().

(Going forward it would probably be a good idea to change macros like this
into inline functions...)

Link: https://lkml.kernel.org/r/20221123165652.2204925-3-jannh@xxxxxxxxxx
Fixes: a6d60245d6d9 ("asm-generic/tlb: Track which levels of the page table=
s have been cleared")
Signed-off-by: Jann Horn <jannh@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 include/asm-generic/tlb.h |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/include/asm-generic/tlb.h~mmu_gather-use-macro-arguments-more-carefully
+++ a/include/asm-generic/tlb.h
@@ -630,7 +630,7 @@ static inline void tlb_flush_p4d_range(s
 #define pte_free_tlb(tlb, ptep, address)			\
 	do {							\
 		tlb_flush_pmd_range(tlb, address, PAGE_SIZE);	\
-		tlb->freed_tables = 1;				\
+		(tlb)->freed_tables = 1;			\
 		__pte_free_tlb(tlb, ptep, address);		\
 	} while (0)
 #endif
@@ -639,7 +639,7 @@ static inline void tlb_flush_p4d_range(s
 #define pmd_free_tlb(tlb, pmdp, address)			\
 	do {							\
 		tlb_flush_pud_range(tlb, address, PAGE_SIZE);	\
-		tlb->freed_tables = 1;				\
+		(tlb)->freed_tables = 1;			\
 		__pmd_free_tlb(tlb, pmdp, address);		\
 	} while (0)
 #endif
@@ -648,7 +648,7 @@ static inline void tlb_flush_p4d_range(s
 #define pud_free_tlb(tlb, pudp, address)			\
 	do {							\
 		tlb_flush_p4d_range(tlb, address, PAGE_SIZE);	\
-		tlb->freed_tables = 1;				\
+		(tlb)->freed_tables = 1;			\
 		__pud_free_tlb(tlb, pudp, address);		\
 	} while (0)
 #endif
@@ -657,7 +657,7 @@ static inline void tlb_flush_p4d_range(s
 #define p4d_free_tlb(tlb, pudp, address)			\
 	do {							\
 		__tlb_adjust_range(tlb, address, PAGE_SIZE);	\
-		tlb->freed_tables = 1;				\
+		(tlb)->freed_tables = 1;			\
 		__p4d_free_tlb(tlb, pudp, address);		\
 	} while (0)
 #endif
_

Patches currently in -mm which might be from jannh@xxxxxxxxxx are

mm-khugepaged-take-the-right-locks-for-page-table-retraction.patch
mmu_gather-use-macro-arguments-more-carefully.patch
mm-khugepaged-fix-gup-fast-interaction-by-freeing-ptes-via-mmu_gather.patch
mm-khugepaged-invoke-mmu-notifiers-in-shmem-file-collapse-paths.patch




[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux