From: Julia Lawall <[EMAIL PROTECTED]> The functions time_before, time_before_eq, time_after, and time_after_eq are more robust for comparing jiffies against other values.
A simplified version of the semantic patch making this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @ change_compare_np @ expression E; @@ ( - jiffies <= E + time_before_eq(jiffies,E) | - jiffies >= E + time_after_eq(jiffies,E) | - jiffies < E + time_before(jiffies,E) | - jiffies > E + time_after(jiffies,E) ) @ include depends on change_compare_np @ @@ #include <linux/jiffies.h> @ no_include depends on !include && change_compare_np @ @@ #include <linux/...> + #include <linux/jiffies.h> // </smpl> Signed-off-by: Julia Lawall <[EMAIL PROTECTED]> --- diff -r -u -p a/drivers/media/video/c-qcam.c b/drivers/media/video/c-qcam.c --- a/drivers/media/video/c-qcam.c 2007-11-01 10:30:39.000000000 +0100 +++ b/drivers/media/video/c-qcam.c 2007-12-23 20:36:52.000000000 +0100 @@ -36,6 +36,7 @@ #include <linux/videodev.h> #include <media/v4l2-common.h> #include <linux/mutex.h> +#include <linux/jiffies.h> #include <asm/uaccess.h> @@ -95,7 +96,8 @@ static unsigned int qcam_await_ready1(st unsigned long oldjiffies = jiffies; unsigned int i; - for (oldjiffies = jiffies; (jiffies - oldjiffies) < msecs_to_jiffies(40); ) + for (oldjiffies = jiffies; + time_before(jiffies, oldjiffies + msecs_to_jiffies(40)); ) if (qcam_ready1(qcam) == value) return 0; @@ -120,7 +122,8 @@ static unsigned int qcam_await_ready2(st unsigned long oldjiffies = jiffies; unsigned int i; - for (oldjiffies = jiffies; (jiffies - oldjiffies) < msecs_to_jiffies(40); ) + for (oldjiffies = jiffies; + time_before(jiffies, oldjiffies + msecs_to_jiffies(40)); ) if (qcam_ready2(qcam) == value) return 0; diff -r -u -p a/drivers/media/video/ivtv/ivtv-fileops.c b/drivers/media/video/ivtv/ivtv-fileops.c --- a/drivers/media/video/ivtv/ivtv-fileops.c 2007-11-01 10:30:39.000000000 +0100 +++ b/drivers/media/video/ivtv/ivtv-fileops.c 2007-12-23 20:37:15.000000000 +0100 @@ -219,7 +219,9 @@ static struct ivtv_buffer *ivtv_get_buff /* Process pending program info updates and pending VBI data */ ivtv_update_pgm_info(itv); - if (jiffies - itv->dualwatch_jiffies > msecs_to_jiffies(1000)) { + if (time_after(jiffies, + itv->dualwatch_jiffies + + msecs_to_jiffies(1000))) { itv->dualwatch_jiffies = jiffies; ivtv_dualwatch(itv); } diff -r -u -p a/drivers/media/video/ivtv/ivtv-mailbox.c b/drivers/media/video/ivtv/ivtv-mailbox.c --- a/drivers/media/video/ivtv/ivtv-mailbox.c 2007-10-22 11:25:10.000000000 +0200 +++ b/drivers/media/video/ivtv/ivtv-mailbox.c 2007-12-23 20:37:40.000000000 +0100 @@ -177,7 +177,8 @@ static int get_mailbox(struct ivtv *itv, /* Sleep before a retry, if not atomic */ if (!(flags & API_NO_WAIT_MB)) { - if (jiffies - then > msecs_to_jiffies(10*retries)) + if (time_after(jiffies, + then + msecs_to_jiffies(10*retries))) break; ivtv_msleep_timeout(10, 0); } @@ -244,7 +245,9 @@ static int ivtv_api_call(struct ivtv *it data, then just return 0 as there is no need to issue this command again. Just an optimization to prevent unnecessary use of mailboxes. */ if (itv->api_cache[cmd].last_jiffies && - jiffies - itv->api_cache[cmd].last_jiffies < msecs_to_jiffies(1800000) && + time_before(jiffies, + itv->api_cache[cmd].last_jiffies + + msecs_to_jiffies(1800000)) && !memcmp(data, itv->api_cache[cmd].data, sizeof(itv->api_cache[cmd].data))) { itv->api_cache[cmd].last_jiffies = jiffies; return 0; @@ -299,7 +302,7 @@ static int ivtv_api_call(struct ivtv *it } } while (!(readl(&mbox->flags) & IVTV_MBOX_FIRMWARE_DONE)) { - if (jiffies - then > api_timeout) { + if (time_after(jiffies, then + api_timeout)) { IVTV_DEBUG_WARN("Could not get result (%s)\n", api_info[cmd].name); /* reset the mailbox, but it is likely too late already */ write_sync(0, &mbox->flags); @@ -311,7 +314,7 @@ static int ivtv_api_call(struct ivtv *it else ivtv_msleep_timeout(1, 0); } - if (jiffies - then > msecs_to_jiffies(100)) + if (time_after(jiffies, then + msecs_to_jiffies(100))) IVTV_DEBUG_WARN("%s took %u jiffies\n", api_info[cmd].name, jiffies_to_msecs(jiffies - then)); diff -r -u -p a/drivers/media/video/ivtv/ivtv-streams.c b/drivers/media/video/ivtv/ivtv-streams.c --- a/drivers/media/video/ivtv/ivtv-streams.c 2007-12-13 20:41:15.000000000 +0100 +++ b/drivers/media/video/ivtv/ivtv-streams.c 2007-12-23 20:37:55.000000000 +0100 @@ -783,7 +783,8 @@ int ivtv_stop_v4l2_encode_stream(struct /* wait 2s for EOS interrupt */ while (!test_bit(IVTV_F_I_EOS, &itv->i_flags) && - jiffies < then + msecs_to_jiffies (2000)) { + time_before(jiffies, + then + msecs_to_jiffies(2000))) { schedule_timeout(msecs_to_jiffies(10)); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
