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Date: Mon, 31 May 2021 11:18:48 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: Jarmo Tiitto <jarmo.tiitto@...il.com>
Cc: samitolvanen@...gle.com, wcw@...gle.com, ndesaulniers@...gle.com,
linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com
Subject: Re: [PATCH 6/6] pgo: Fixup code style issues.
On Fri, May 28, 2021 at 11:12:13PM +0300, Jarmo Tiitto wrote:
> Signed-off-by: Jarmo Tiitto <jarmo.tiitto@...il.com>
This should be squashed into 4/6. Do not introduce issues in the middle
of a patch series. A couple more comments below.
> ---
> kernel/pgo/instrument.c | 106 ++++++++++++++++++++--------------------
> 1 file changed, 53 insertions(+), 53 deletions(-)
>
> diff --git a/kernel/pgo/instrument.c b/kernel/pgo/instrument.c
> index a95c86d668b5..b30104411879 100644
> --- a/kernel/pgo/instrument.c
> +++ b/kernel/pgo/instrument.c
> @@ -31,7 +31,7 @@
> * ensures that we don't try to serialize data that's only partially updated.
> */
> static DEFINE_SPINLOCK(pgo_lock);
> -static int current_node = 0;
> +static int current_node;
>
> unsigned long prf_lock(void)
> {
> @@ -55,58 +55,58 @@ void prf_unlock(unsigned long flags)
> static struct llvm_prf_value_node *allocate_node(struct llvm_prf_data *p,
> u32 index, u64 value)
> {
> - struct prf_mod_private_data *pmod;
> - struct llvm_prf_data *start = __llvm_prf_data_start;
> - struct llvm_prf_data *end = __llvm_prf_data_end;
> - struct module * mod;
> - struct llvm_prf_value_node * vnds = __llvm_prf_vnds_start;
> - struct llvm_prf_value_node * vnds_end = __llvm_prf_vnds_end;
> -
> - if(start <= p && p < end) {
> - /* vmlinux core node */
> - if (&vnds[current_node + 1] >= vnds_end)
> - return NULL; /* Out of nodes */
> -
> - current_node++;
> -
> - /* Make sure the node is entirely within the section
> - */
> - if (&vnds[current_node] >= vnds_end ||
> - &vnds[current_node + 1] > vnds_end)
> - return NULL;
> -
> - return &vnds[current_node];
> -
> - } else {
> - /* maybe an module node
> - * find in what module section p points into and
> - * then allocate from that module
> - */
> - rcu_read_lock();
> - list_for_each_entry_rcu(pmod,&prf_mod_list,link) {
> - mod = READ_ONCE(pmod->mod);
> - if(mod) {
> - /* get section bounds */
> - start = mod->prf_data;
> - end = mod->prf_data + mod->prf_data_size;
> - if(start <= p && p < end)
> - {
> - vnds = mod->prf_vnds;
> - vnds_end = mod->prf_vnds + mod->prf_vnds_size;
> - if (&vnds[pmod->current_node + 1] < vnds_end) {
> - pmod->current_node++;
> -
> - vnds = &vnds[pmod->current_node];
> - rcu_read_unlock();
> - return vnds;
> - break;
> - }
> - }
> - }
> - }
> - rcu_read_unlock();
> - return NULL; /* Out of nodes */
> - }
> + struct prf_mod_private_data *pmod;
> + struct llvm_prf_data *start = __llvm_prf_data_start;
> + struct llvm_prf_data *end = __llvm_prf_data_end;
> + struct module *mod;
> + struct llvm_prf_value_node *vnds = __llvm_prf_vnds_start;
> + struct llvm_prf_value_node *vnds_end = __llvm_prf_vnds_end;
> +
> + if (start <= p && p < end) {
> + /* vmlinux core node */
> + if (&vnds[current_node + 1] >= vnds_end)
> + return NULL; /* Out of nodes */
> +
> + current_node++;
> +
> + /* Make sure the node is entirely within the section
> + */
Move the '*/' to the end of the previous line.
> + if (&vnds[current_node] >= vnds_end ||
> + &vnds[current_node + 1] > vnds_end)
> + return NULL;
> +
> + return &vnds[current_node];
> +
Remove this blank line.
> + } else {
> + /* maybe an module node
> + * find in what module section p points into and
> + * then allocate from that module
> + */
> + rcu_read_lock();
> + list_for_each_entry_rcu(pmod, &prf_mod_list, link) {
> + mod = READ_ONCE(pmod->mod);
> + if (mod) {
> + /* get section bounds */
> + start = mod->prf_data;
> + end = mod->prf_data + mod->prf_data_size;
> +
> + if (start <= p && p < end) {
> + vnds = mod->prf_vnds;
> + vnds_end = mod->prf_vnds + mod->prf_vnds_size;
> +
> + if (&vnds[pmod->current_node + 1] < vnds_end) {
> + pmod->current_node++;
> +
> + vnds = &vnds[pmod->current_node];
> + rcu_read_unlock();
> + return vnds;
> + }
> + }
> + }
> + }
> + rcu_read_unlock();
> + return NULL; /* Out of nodes */
> + }
> }
>
> /*
> --
> 2.31.1
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