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DLPX-83701 Make the kernel function mnt_add_count() traceable #24

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Dec 7, 2022
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DLPX-83701 Make the kernel function mnt_add_count() traceable #24

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5 changes: 3 additions & 2 deletions fs/namespace.c
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Original file line number Diff line number Diff line change
Expand Up @@ -142,7 +142,7 @@ void mnt_release_group_id(struct mount *mnt)
/*
* vfsmount lock must be held for read
*/
static inline void mnt_add_count(struct mount *mnt, int n)
static noinline __noclone void mnt_add_count(struct mount *mnt, int n)
{
#ifdef CONFIG_SMP
this_cpu_add(mnt->mnt_pcp->mnt_count, n);
Expand Down Expand Up @@ -1514,7 +1514,8 @@ static int do_umount_root(struct super_block *sb)
return ret;
}

static int do_umount(struct mount *mnt, int flags)
/* force a bpftrace dynamic function probe here */
static noinline __noclone int do_umount(struct mount *mnt, int flags)
{
struct super_block *sb = mnt->mnt.mnt_sb;
int retval;
Expand Down