print_symbol() uses extra stack space to sprintf() symbol
information and then to feed that buffer to printk()
char buffer[KSYM_SYMBOL_LEN];
sprint_symbol(buffer, address);
printk(fmt, buffer);
Replace print_symbol() with a direct printk("%pS") call.
Additionally ia64_do_show_stack() had extra buffer [128
bytes on stack], which we also can drop now.
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
---
arch/ia64/kernel/process.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index dda0082056b3..968b5f33e725 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -13,7 +13,6 @@
#include <linux/pm.h>
#include <linux/elf.h>
#include <linux/errno.h>
-#include <linux/kallsyms.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/slab.h>
@@ -69,7 +68,6 @@ void
ia64_do_show_stack (struct unw_frame_info *info, void *arg)
{
unsigned long ip, sp, bsp;
- char buf[128]; /* don't make it so big that it overflows the stack! */
printk("\nCall Trace:\n");
do {
@@ -79,11 +77,9 @@ ia64_do_show_stack (struct unw_frame_info *info, void *arg)
unw_get_sp(info, &sp);
unw_get_bsp(info, &bsp);
- snprintf(buf, sizeof(buf),
- " [<%016lx>] %%s\n"
+ printk(" [<%016lx>] %pS\n"
" sp=%016lx bsp=%016lx\n",
- ip, sp, bsp);
- print_symbol(buf, ip);
+ ip, (void *)ip, sp, bsp);
} while (unw_unwind(info) >= 0);
}
@@ -111,7 +107,7 @@ show_regs (struct pt_regs *regs)
printk("psr : %016lx ifs : %016lx ip : [<%016lx>] %s (%s)\n",
regs->cr_ipsr, regs->cr_ifs, ip, print_tainted(),
init_utsname()->release);
- print_symbol("ip is at %s\n", ip);
+ printk("ip is at %pS\n", (void *)ip);
printk("unat: %016lx pfs : %016lx rsc : %016lx\n",
regs->ar_unat, regs->ar_pfs, regs->ar_rsc);
printk("rnat: %016lx bsps: %016lx pr : %016lx\n",
--
2.15.1
--
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