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| author |   Souptick Joarder <jrdr.linux@gmail.com> | 2020-06-07 21:40:55 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-08 11:05:56 -0700 |
| commit | dadbb612f6e50bbf9101c2f5d82690ce9ea4d66b (patch) | |
| tree | 6395c50985da61e0b2b25ccf73947f51b81918bf /kernel/events | |
| parent | kernel/sysctl.c: ignore out-of-range taint bits introduced via kernel.tainted (diff) | |
| download | wireguard-linux-dadbb612f6e50bbf9101c2f5d82690ce9ea4d66b.tar.xz wireguard-linux-dadbb612f6e50bbf9101c2f5d82690ce9ea4d66b.zip | |
mm/gup.c: convert to use get_user_{page|pages}_fast_only()
API __get_user_pages_fast() renamed to get_user_pages_fast_only() to
align with pin_user_pages_fast_only().
As part of this we will get rid of write parameter. Instead caller will
pass FOLL_WRITE to get_user_pages_fast_only(). This will not change any
existing functionality of the API.
All the callers are changed to pass FOLL_WRITE.
Also introduce get_user_page_fast_only(), and use it in a few places
that hard-code nr_pages to 1.
Updated the documentation of the API.
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Paul Mackerras <paulus@ozlabs.org> [arch/powerpc/kvm]
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Michal Suchanek <msuchanek@suse.de>
Link: http://lkml.kernel.org/r/1590396812-31277-1-git-send-email-jrdr.linux@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/events')
| -rw-r--r-- | kernel/events/core.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index fcfadecd3a08..63d66bbebbd5 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -6934,12 +6934,12 @@ static u64 perf_virt_to_phys(u64 virt) * Walking the pages tables for user address. * Interrupts are disabled, so it prevents any tear down * of the page tables. - * Try IRQ-safe __get_user_pages_fast first. + * Try IRQ-safe get_user_page_fast_only first. * If failed, leave phys_addr as 0. */ if (current->mm != NULL) { pagefault_disable(); - if (__get_user_pages_fast(virt, 1, 0, &p) == 1) + if (get_user_page_fast_only(virt, 0, &p)) phys_addr = page_to_phys(p) + virt % PAGE_SIZE; pagefault_enable(); } |