mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
acafe7e302
One of the more common cases of allocation size calculations is finding
the size of a structure that has a zero-sized array at the end, along
with memory for some number of elements for that array. For example:
struct foo {
int stuff;
void *entry[];
};
instance = kmalloc(sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL);
Instead of leaving these open-coded and prone to type mistakes, we can
now use the new struct_size() helper:
instance = kmalloc(struct_size(instance, entry, count), GFP_KERNEL);
This patch makes the changes for kmalloc()-family (and kvmalloc()-family)
uses. It was done via automatic conversion with manual review for the
"CHECKME" non-standard cases noted below, using the following Coccinelle
script:
// pkey_cache = kmalloc(sizeof *pkey_cache + tprops->pkey_tbl_len *
// sizeof *pkey_cache->table, GFP_KERNEL);
@@
identifier alloc =~ "kmalloc|kzalloc|kvmalloc|kvzalloc";
expression GFP;
identifier VAR, ELEMENT;
expression COUNT;
@@
- alloc(sizeof(*VAR) + COUNT * sizeof(*VAR->ELEMENT), GFP)
+ alloc(struct_size(VAR, ELEMENT, COUNT), GFP)
// mr = kzalloc(sizeof(*mr) + m * sizeof(mr->map[0]), GFP_KERNEL);
@@
identifier alloc =~ "kmalloc|kzalloc|kvmalloc|kvzalloc";
expression GFP;
identifier VAR, ELEMENT;
expression COUNT;
@@
- alloc(sizeof(*VAR) + COUNT * sizeof(VAR->ELEMENT[0]), GFP)
+ alloc(struct_size(VAR, ELEMENT, COUNT), GFP)
// Same pattern, but can't trivially locate the trailing element name,
// or variable name.
@@
identifier alloc =~ "kmalloc|kzalloc|kvmalloc|kvzalloc";
expression GFP;
expression SOMETHING, COUNT, ELEMENT;
@@
- alloc(sizeof(SOMETHING) + COUNT * sizeof(ELEMENT), GFP)
+ alloc(CHECKME_struct_size(&SOMETHING, ELEMENT, COUNT), GFP)
Signed-off-by: Kees Cook <keescook@chromium.org>
88 lines
3.3 KiB
C
88 lines
3.3 KiB
C
/*
|
|
* Copyright (C) 2013 Pengutronix
|
|
* Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it under
|
|
* the terms of the GNU General Public License version 2 as published by the
|
|
* Free Software Foundation.
|
|
*/
|
|
#include <linux/io.h>
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <dt-bindings/clock/efm32-cmu.h>
|
|
|
|
#define CMU_HFPERCLKEN0 0x44
|
|
#define CMU_MAX_CLKS 37
|
|
|
|
static struct clk_hw_onecell_data *clk_data;
|
|
|
|
static void __init efm32gg_cmu_init(struct device_node *np)
|
|
{
|
|
int i;
|
|
void __iomem *base;
|
|
struct clk_hw **hws;
|
|
|
|
clk_data = kzalloc(struct_size(clk_data, hws, CMU_MAX_CLKS),
|
|
GFP_KERNEL);
|
|
|
|
if (!clk_data)
|
|
return;
|
|
|
|
hws = clk_data->hws;
|
|
|
|
for (i = 0; i < CMU_MAX_CLKS; ++i)
|
|
hws[i] = ERR_PTR(-ENOENT);
|
|
|
|
base = of_iomap(np, 0);
|
|
if (!base) {
|
|
pr_warn("Failed to map address range for efm32gg,cmu node\n");
|
|
return;
|
|
}
|
|
|
|
hws[clk_HFXO] = clk_hw_register_fixed_rate(NULL, "HFXO", NULL, 0,
|
|
48000000);
|
|
|
|
hws[clk_HFPERCLKUSART0] = clk_hw_register_gate(NULL, "HFPERCLK.USART0",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 0, 0, NULL);
|
|
hws[clk_HFPERCLKUSART1] = clk_hw_register_gate(NULL, "HFPERCLK.USART1",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 1, 0, NULL);
|
|
hws[clk_HFPERCLKUSART2] = clk_hw_register_gate(NULL, "HFPERCLK.USART2",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 2, 0, NULL);
|
|
hws[clk_HFPERCLKUART0] = clk_hw_register_gate(NULL, "HFPERCLK.UART0",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 3, 0, NULL);
|
|
hws[clk_HFPERCLKUART1] = clk_hw_register_gate(NULL, "HFPERCLK.UART1",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 4, 0, NULL);
|
|
hws[clk_HFPERCLKTIMER0] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER0",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 5, 0, NULL);
|
|
hws[clk_HFPERCLKTIMER1] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER1",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 6, 0, NULL);
|
|
hws[clk_HFPERCLKTIMER2] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER2",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 7, 0, NULL);
|
|
hws[clk_HFPERCLKTIMER3] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER3",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 8, 0, NULL);
|
|
hws[clk_HFPERCLKACMP0] = clk_hw_register_gate(NULL, "HFPERCLK.ACMP0",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 9, 0, NULL);
|
|
hws[clk_HFPERCLKACMP1] = clk_hw_register_gate(NULL, "HFPERCLK.ACMP1",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 10, 0, NULL);
|
|
hws[clk_HFPERCLKI2C0] = clk_hw_register_gate(NULL, "HFPERCLK.I2C0",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 11, 0, NULL);
|
|
hws[clk_HFPERCLKI2C1] = clk_hw_register_gate(NULL, "HFPERCLK.I2C1",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 12, 0, NULL);
|
|
hws[clk_HFPERCLKGPIO] = clk_hw_register_gate(NULL, "HFPERCLK.GPIO",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 13, 0, NULL);
|
|
hws[clk_HFPERCLKVCMP] = clk_hw_register_gate(NULL, "HFPERCLK.VCMP",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 14, 0, NULL);
|
|
hws[clk_HFPERCLKPRS] = clk_hw_register_gate(NULL, "HFPERCLK.PRS",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 15, 0, NULL);
|
|
hws[clk_HFPERCLKADC0] = clk_hw_register_gate(NULL, "HFPERCLK.ADC0",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 16, 0, NULL);
|
|
hws[clk_HFPERCLKDAC0] = clk_hw_register_gate(NULL, "HFPERCLK.DAC0",
|
|
"HFXO", 0, base + CMU_HFPERCLKEN0, 17, 0, NULL);
|
|
|
|
of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data);
|
|
}
|
|
CLK_OF_DECLARE(efm32ggcmu, "efm32gg,cmu", efm32gg_cmu_init);
|