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authorJoerg Roedel <jroedel@suse.de>2020-06-01 21:52:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-02 10:59:12 -0700
commit73f693c3a705756032c2863bfb37570276902d7d (patch)
tree7a22b838b245fa42ccf1e33e900030c5967ee0cc /kernel/trace
parent86cf69f1d893d48fdb0382a940f2523409406423 (diff)
mm: remove vmalloc_sync_(un)mappings()
These functions are not needed anymore because the vmalloc and ioremap mappings are now synchronized when they are created or torn down. Remove all callers and function definitions. Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Tested-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Acked-by: Andy Lutomirski <luto@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "H . Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vlastimil Babka <vbabka@suse.cz> Link: http://lkml.kernel.org/r/20200515140023.25469-7-joro@8bytes.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace.c12
1 files changed, 0 insertions, 12 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 29615f15a820..f12e99b387b2 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -8527,18 +8527,6 @@ static int allocate_trace_buffers(struct trace_array *tr, int size)
allocate_snapshot = false;
#endif
- /*
- * Because of some magic with the way alloc_percpu() works on
- * x86_64, we need to synchronize the pgd of all the tables,
- * otherwise the trace events that happen in x86_64 page fault
- * handlers can't cope with accessing the chance that a
- * alloc_percpu()'d memory might be touched in the page fault trace
- * event. Oh, and we need to audit all other alloc_percpu() and vmalloc()
- * calls in tracing, because something might get triggered within a
- * page fault trace event!
- */
- vmalloc_sync_mappings();
-
return 0;
}