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author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2010-06-30 12:16:24 +0200 |
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committer | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2010-07-26 14:27:25 +0200 |
commit | 2dcf78c0eeae3bd07082821557014f25f02ca2e9 (patch) | |
tree | 8ca5c4c7f35c9a9ab07fcd9732124c905e609aa1 /kernel/trace/ring_buffer.c | |
parent | 6b6322676add0fa2713d0ec89a28390fd4d907f5 (diff) | |
parent | 5109a4597f7e758b8d20694392d0361a0b4c43b1 (diff) | |
download | op-kernel-dev-2dcf78c0eeae3bd07082821557014f25f02ca2e9.zip op-kernel-dev-2dcf78c0eeae3bd07082821557014f25f02ca2e9.tar.gz |
Merge branch 'imx/for-2.6.36' of git://git.pengutronix.de/git/ukl/linux-2.6 into HEAD
There are some more conflicts than detected by git, namely support for
the newly added cpuimx machines needed to be converted to dynamic device
registration.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Conflicts:
arch/arm/mach-imx/Makefile
arch/arm/mach-imx/devices.c
arch/arm/mach-imx/devices.h
arch/arm/mach-imx/eukrea_mbimx27-baseboard.c
arch/arm/mach-mx2/Kconfig
arch/arm/mach-mx25/Makefile
arch/arm/mach-mx25/devices.c
arch/arm/plat-mxc/include/mach/mx25.h
arch/arm/plat-mxc/include/mach/mxc_nand.h
Diffstat (limited to 'kernel/trace/ring_buffer.c')
-rw-r--r-- | kernel/trace/ring_buffer.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 7f6059c..1da7b6e 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -1768,6 +1768,14 @@ rb_reset_tail(struct ring_buffer_per_cpu *cpu_buffer, * must fill the old tail_page with padding. */ if (tail >= BUF_PAGE_SIZE) { + /* + * If the page was filled, then we still need + * to update the real_end. Reset it to zero + * and the reader will ignore it. + */ + if (tail == BUF_PAGE_SIZE) + tail_page->real_end = 0; + local_sub(length, &tail_page->write); return; } @@ -3894,12 +3902,12 @@ int ring_buffer_read_page(struct ring_buffer *buffer, ret = read; cpu_buffer->lost_events = 0; + + commit = local_read(&bpage->commit); /* * Set a flag in the commit field if we lost events */ if (missed_events) { - commit = local_read(&bpage->commit); - /* If there is room at the end of the page to save the * missed events, then record it there. */ @@ -3907,10 +3915,17 @@ int ring_buffer_read_page(struct ring_buffer *buffer, memcpy(&bpage->data[commit], &missed_events, sizeof(missed_events)); local_add(RB_MISSED_STORED, &bpage->commit); + commit += sizeof(missed_events); } local_add(RB_MISSED_EVENTS, &bpage->commit); } + /* + * This page may be off to user land. Zero it out here. + */ + if (commit < BUF_PAGE_SIZE) + memset(&bpage->data[commit], 0, BUF_PAGE_SIZE - commit); + out_unlock: spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags); |