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| author | Vegard Nossum <vegard.nossum@oracle.com> | 2017-02-27 14:30:07 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-27 18:43:48 -0800 |
| commit | f1f1007644ffc8051a4c11427d58b1967ae7b75a (patch) | |
| tree | e7e590cb1baa494b963d81b967a3f98d3c56f33e /arch/sparc | |
| parent | 522b837c672eba9e9fb69f9f52bced0256dc6697 (diff) | |
| download | linux-stable-f1f1007644ffc8051a4c11427d58b1967ae7b75a.tar.gz linux-stable-f1f1007644ffc8051a4c11427d58b1967ae7b75a.tar.bz2 linux-stable-f1f1007644ffc8051a4c11427d58b1967ae7b75a.zip | |
mm: add new mmgrab() helper
Apart from adding the helper function itself, the rest of the kernel is
converted mechanically using:
git grep -l 'atomic_inc.*mm_count' | xargs sed -i 's/atomic_inc(&\(.*\)->mm_count);/mmgrab\(\1\);/'
git grep -l 'atomic_inc.*mm_count' | xargs sed -i 's/atomic_inc(&\(.*\)\.mm_count);/mmgrab\(\&\1\);/'
This is needed for a later patch that hooks into the helper, but might
be a worthwhile cleanup on its own.
(Michal Hocko provided most of the kerneldoc comment.)
Link: http://lkml.kernel.org/r/20161218123229.22952-1-vegard.nossum@oracle.com
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/sparc')
| -rw-r--r-- | arch/sparc/kernel/leon_smp.c | 2 | ||||
| -rw-r--r-- | arch/sparc/kernel/smp_64.c | 2 | ||||
| -rw-r--r-- | arch/sparc/kernel/sun4d_smp.c | 2 | ||||
| -rw-r--r-- | arch/sparc/kernel/sun4m_smp.c | 2 | ||||
| -rw-r--r-- | arch/sparc/kernel/traps_32.c | 2 | ||||
| -rw-r--r-- | arch/sparc/kernel/traps_64.c | 2 |
6 files changed, 6 insertions, 6 deletions
diff --git a/arch/sparc/kernel/leon_smp.c b/arch/sparc/kernel/leon_smp.c index 71e16f2241c2..b99d33797e1d 100644 --- a/arch/sparc/kernel/leon_smp.c +++ b/arch/sparc/kernel/leon_smp.c @@ -93,7 +93,7 @@ void leon_cpu_pre_online(void *arg) : "memory" /* paranoid */); /* Attach to the address space of init_task. */ - atomic_inc(&init_mm.mm_count); + mmgrab(&init_mm); current->active_mm = &init_mm; while (!cpumask_test_cpu(cpuid, &smp_commenced_mask)) diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c index 90a02cb64e20..8e3e13924594 100644 --- a/arch/sparc/kernel/smp_64.c +++ b/arch/sparc/kernel/smp_64.c @@ -122,7 +122,7 @@ void smp_callin(void) current_thread_info()->new_child = 0; /* Attach to the address space of init_task. */ - atomic_inc(&init_mm.mm_count); + mmgrab(&init_mm); current->active_mm = &init_mm; /* inform the notifiers about the new cpu */ diff --git a/arch/sparc/kernel/sun4d_smp.c b/arch/sparc/kernel/sun4d_smp.c index 9d98e5002a09..7b55c50eabe5 100644 --- a/arch/sparc/kernel/sun4d_smp.c +++ b/arch/sparc/kernel/sun4d_smp.c @@ -93,7 +93,7 @@ void sun4d_cpu_pre_online(void *arg) show_leds(cpuid); /* Attach to the address space of init_task. */ - atomic_inc(&init_mm.mm_count); + mmgrab(&init_mm); current->active_mm = &init_mm; local_ops->cache_all(); diff --git a/arch/sparc/kernel/sun4m_smp.c b/arch/sparc/kernel/sun4m_smp.c index 278c40abce82..633c4cf6fdb0 100644 --- a/arch/sparc/kernel/sun4m_smp.c +++ b/arch/sparc/kernel/sun4m_smp.c @@ -59,7 +59,7 @@ void sun4m_cpu_pre_online(void *arg) : "memory" /* paranoid */); /* Attach to the address space of init_task. */ - atomic_inc(&init_mm.mm_count); + mmgrab(&init_mm); current->active_mm = &init_mm; while (!cpumask_test_cpu(cpuid, &smp_commenced_mask)) diff --git a/arch/sparc/kernel/traps_32.c b/arch/sparc/kernel/traps_32.c index 4f21df7d4f13..ecddac5a4c96 100644 --- a/arch/sparc/kernel/traps_32.c +++ b/arch/sparc/kernel/traps_32.c @@ -448,7 +448,7 @@ void trap_init(void) thread_info_offsets_are_bolixed_pete(); /* Attach to the address space of init_task. */ - atomic_inc(&init_mm.mm_count); + mmgrab(&init_mm); current->active_mm = &init_mm; /* NOTE: Other cpus have this done as they are started diff --git a/arch/sparc/kernel/traps_64.c b/arch/sparc/kernel/traps_64.c index dfc97a47c9a0..e022d7b00390 100644 --- a/arch/sparc/kernel/traps_64.c +++ b/arch/sparc/kernel/traps_64.c @@ -2837,6 +2837,6 @@ void __init trap_init(void) /* Attach to the address space of init_task. On SMP we * do this in smp.c:smp_callin for other cpus. */ - atomic_inc(&init_mm.mm_count); + mmgrab(&init_mm); current->active_mm = &init_mm; } |