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Subject[PATCH v4 29/34] PCI/P2PDMA: Convert to printbuf
Date
This converts from seq_buf to printbuf. We're using printbuf in external
buffer mode, so it's a direct conversion, aside from some trivial
refactoring in cpu_show_meltdown() to make the code more consistent.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: linux-pci@vger.kernel.org
---
drivers/pci/p2pdma.c | 21 ++++++++-------------
1 file changed, 8 insertions(+), 13 deletions(-)

diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c
index 30b1df3c9d..3b7a6ca446 100644
--- a/drivers/pci/p2pdma.c
+++ b/drivers/pci/p2pdma.c
@@ -17,7 +17,7 @@
#include <linux/memremap.h>
#include <linux/percpu-refcount.h>
#include <linux/random.h>
-#include <linux/seq_buf.h>
+#include <linux/printbuf.h>
#include <linux/xarray.h>

enum pci_p2pdma_map_type {
@@ -281,12 +281,9 @@ static int pci_bridge_has_acs_redir(struct pci_dev *pdev)
return 0;
}

-static void seq_buf_print_bus_devfn(struct seq_buf *buf, struct pci_dev *pdev)
+static void prt_bus_devfn(struct printbuf *buf, struct pci_dev *pdev)
{
- if (!buf)
- return;
-
- seq_buf_printf(buf, "%s;", pci_name(pdev));
+ prt_printf(buf, "%s;", pci_name(pdev));
}

static bool cpu_supports_p2pdma(void)
@@ -455,13 +452,11 @@ calc_map_type_and_dist(struct pci_dev *provider, struct pci_dev *client,
struct pci_dev *a = provider, *b = client, *bb;
bool acs_redirects = false;
struct pci_p2pdma *p2pdma;
- struct seq_buf acs_list;
int acs_cnt = 0;
int dist_a = 0;
int dist_b = 0;
char buf[128];
-
- seq_buf_init(&acs_list, buf, sizeof(buf));
+ struct printbuf acs_list = PRINTBUF_EXTERN(buf, sizeof(buf));

/*
* Note, we don't need to take references to devices returned by
@@ -472,7 +467,7 @@ calc_map_type_and_dist(struct pci_dev *provider, struct pci_dev *client,
dist_b = 0;

if (pci_bridge_has_acs_redir(a)) {
- seq_buf_print_bus_devfn(&acs_list, a);
+ prt_bus_devfn(&acs_list, a);
acs_cnt++;
}

@@ -501,7 +496,7 @@ calc_map_type_and_dist(struct pci_dev *provider, struct pci_dev *client,
break;

if (pci_bridge_has_acs_redir(bb)) {
- seq_buf_print_bus_devfn(&acs_list, bb);
+ prt_bus_devfn(&acs_list, bb);
acs_cnt++;
}

@@ -516,11 +511,11 @@ calc_map_type_and_dist(struct pci_dev *provider, struct pci_dev *client,
}

if (verbose) {
- acs_list.buffer[acs_list.len-1] = 0; /* drop final semicolon */
+ acs_list.buf[acs_list.pos-1] = 0; /* drop final semicolon */
pci_warn(client, "ACS redirect is set between the client and provider (%s)\n",
pci_name(provider));
pci_warn(client, "to disable ACS redirect for this path, add the kernel parameter: pci=disable_acs_redir=%s\n",
- acs_list.buffer);
+ acs_list.buf);
}
acs_redirects = true;

--
2.36.1
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