From d6dd61c831226f9cd7750885da04d360d6455101 Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge Date: Wed, 2 May 2007 19:27:14 +0200 Subject: [PATCH] x86: PARAVIRT: add hooks to intercept mm creation and destruction Add hooks to allow a paravirt implementation to track the lifetime of an mm. Paravirtualization requires three hooks, but only two are needed in common code. They are: arch_dup_mmap, which is called when a new mmap is created at fork arch_exit_mmap, which is called when the last process reference to an mm is dropped, which typically happens on exit and exec. The third hook is activate_mm, which is called from the arch-specific activate_mm() macro/function, and so doesn't need stub versions for other architectures. It's called when an mm is first used. Signed-off-by: Jeremy Fitzhardinge Signed-off-by: Andi Kleen Cc: linux-arch@vger.kernel.org Cc: James Bottomley Acked-by: Ingo Molnar --- mm/mmap.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'mm/mmap.c') diff --git a/mm/mmap.c b/mm/mmap.c index 84f997da78d7..88da687bde89 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -29,6 +29,7 @@ #include #include #include +#include #ifndef arch_mmap_check #define arch_mmap_check(addr, len, flags) (0) @@ -1979,6 +1980,9 @@ void exit_mmap(struct mm_struct *mm) unsigned long nr_accounted = 0; unsigned long end; + /* mm's last user has gone, and its about to be pulled down */ + arch_exit_mmap(mm); + lru_add_drain(); flush_cache_mm(mm); tlb = tlb_gather_mmu(mm, 1); -- cgit v1.2.3-58-ga151