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Revert "ANDROID: vendor_hooks:vendor hook for mmput"

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This reverts commit 8b19ed264b.

The hook android_vh_mmput is not used by any vendor, so remove it to
help with merge issues with future LTS releases.

If this is needed by any real user, it can easily be reverted to add it
back and then the symbol should be added to the abi list at the same
time to prevent it from being removed again later.

Bug: 203756332
Bug: 238821038
Cc: xiaofeng <xiaofeng5@xiaomi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Idd40f231640723d2342a9dbac7e9206a800e82dd
This commit is contained in:
Greg Kroah-Hartman
2022-08-16 13:12:42 +02:00
parent 23fdb24a48
commit 501063ce66
3 changed files with 1 additions and 8 deletions
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1
drivers/android/vendor_hooks.c
View File

@@ -448,5 +448,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_si_swapinfo);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_alloc_si);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_set_shmem_page_flag);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_pidfd_open);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_mmput);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_sched_pelt_multiplier);

4
include/trace/hooks/sched.h
View File

@@ -395,10 +395,6 @@ DECLARE_HOOK(android_vh_pidfd_open,
TP_PROTO(struct pid *p),
TP_ARGS(p));
DECLARE_HOOK(android_vh_mmput,
TP_PROTO(void *unused),
TP_ARGS(unused));
DECLARE_HOOK(android_vh_sched_pelt_multiplier,
TP_PROTO(unsigned int old, unsigned int cur, int *ret),
TP_ARGS(old, cur, ret));

4
kernel/fork.c
View File

@@ -1150,10 +1150,8 @@ void mmput(struct mm_struct *mm)
{
might_sleep();
if (atomic_dec_and_test(&mm->mm_users)) {
trace_android_vh_mmput(NULL);
if (atomic_dec_and_test(&mm->mm_users))
__mmput(mm);
}
}
EXPORT_SYMBOL_GPL(mmput);