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authorStephen Boyd <sboyd@codeaurora.org>2012-05-29 15:07:33 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-29 16:22:32 -0700
commit4796dd200db943e36f876e7029552212e5bbdf33 (patch)
treea594c2b1ce1f4dbc96b25a516e49655917a9fa30 /lib/vsprintf.c
parent05a6c8a9226599f921bd0b6e439dbc04df96a6fc (diff)
downloadlinux-stericsson-4796dd200db943e36f876e7029552212e5bbdf33.tar.gz
vsprintf: fix %ps on non symbols when using kallsyms
Using %ps in a printk format will sometimes fail silently and print the empty string if the address passed in does not match a symbol that kallsyms knows about. But using %pS will fall back to printing the full address if kallsyms can't find the symbol. Make %ps act the same as %pS by falling back to printing the address. While we're here also make %ps print the module that a symbol comes from so that it matches what %pS already does. Take this simple function for example (in a module): static void test_printk(void) { int test; pr_info("with pS: %pS\n", &test); pr_info("with ps: %ps\n", &test); } Before this patch: with pS: 0xdff7df44 with ps: After this patch: with pS: 0xdff7df44 with ps: 0xdff7df44 Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/vsprintf.c')
-rw-r--r--lib/vsprintf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index abbabec9720a..f5dfe0ca34f6 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -436,7 +436,7 @@ char *symbol_string(char *buf, char *end, void *ptr,
else if (ext != 'f' && ext != 's')
sprint_symbol(sym, value);
else
- kallsyms_lookup(value, NULL, NULL, NULL, sym);
+ sprint_symbol_no_offset(sym, value);
return string(buf, end, sym, spec);
#else