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| author | Michael Ellerman <michael@ellerman.id.au> | 2012-10-09 06:20:36 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-11-15 02:59:59 +0100 |
| commit | 0104cd6839bd575f0aa1af4125eb865dc0391aae (patch) | |
| tree | b6bc759e85a2bd98c1f61c5f96235d64c4c111c5 /arch/powerpc | |
| parent | powerpc/xmon: Use STACK_FRAME_OVERHEAD in xmon_show_stack() (diff) | |
| download | linux-0104cd6839bd575f0aa1af4125eb865dc0391aae.tar.xz linux-0104cd6839bd575f0aa1af4125eb865dc0391aae.zip | |
powerpc/xmon: Fiddle xmon_depth_to_print logic in xmon_show_stack()
Currently xmon_depth_to_print is static and global, but it's only
ever used in xmon_show_stack().
At least with a modern compiler it's inlined, so there's no point
in it being static, we could #define it but it's only used in one
place.
By reworking the logic we can drop count and just decrement the
max value as a loop counter. Also switch to a while loop so we
actually print no more than 64 frames as you'd expect based on the
variable name.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/xmon/xmon.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index d940234b09ec..1f8d2f10a432 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -1281,21 +1281,19 @@ static void get_function_bounds(unsigned long pc, unsigned long *startp, catch_memory_errors = 0; } -static int xmon_depth_to_print = 64; - #define LRSAVE_OFFSET (STACK_FRAME_LR_SAVE * sizeof(unsigned long)) #define MARKER_OFFSET (STACK_FRAME_MARKER * sizeof(unsigned long)) static void xmon_show_stack(unsigned long sp, unsigned long lr, unsigned long pc) { + int max_to_print = 64; unsigned long ip; unsigned long newsp; unsigned long marker; - int count = 0; struct pt_regs regs; - do { + while (max_to_print--) { if (sp < PAGE_OFFSET) { if (sp != 0) printf("SP (%lx) is in userspace\n", sp); @@ -1366,7 +1364,7 @@ static void xmon_show_stack(unsigned long sp, unsigned long lr, break; sp = newsp; - } while (count++ < xmon_depth_to_print); + } } static void backtrace(struct pt_regs *excp) |