On 10/31/2024 8:54 AM, Haiyang Zhang wrote: > > >> -----Original Message----- >> From: Easwar Hariharan <eahar...@linux.microsoft.com> >> Sent: Wednesday, October 30, 2024 1:48 PM >> To: KY Srinivasan <k...@microsoft.com>; Haiyang Zhang >> <haiya...@microsoft.com>; Wei Liu <wei....@kernel.org>; Dexuan Cui >> <de...@microsoft.com>; linux-hyperv@vger.kernel.org; Anna-Maria Behnsen >> <anna-ma...@linutronix.de>; Thomas Gleixner <t...@linutronix.de>; Geert >> Uytterhoeven <ge...@linux-m68k.org>; Marcel Holtmann >> <mar...@holtmann.org>; Johan Hedberg <johan.hedb...@gmail.com>; Luiz >> Augusto von Dentz <luiz.de...@gmail.com>; linux- >> blueto...@vger.kernel.org; linux-ker...@vger.kernel.org; Praveen Kumar >> <kumarprav...@linux.microsoft.com>; Naman Jain >> <namj...@linux.microsoft.com> >> Cc: Michael Kelley <mhkli...@outlook.com>; Easwar Hariharan >> <eahar...@linux.microsoft.com>; Von Dentz, Luiz >> <luiz.von.de...@intel.com> >> Subject: [PATCH v3 1/2] jiffies: Define secs_to_jiffies() >> >> secs_to_jiffies() is defined in hci_event.c and cannot be reused by >> other call sites. Hoist it into the core code to allow conversion of the >> ~1150 usages of msecs_to_jiffies() that either: >> - use a multiplier value of 1000 or equivalently MSEC_PER_SEC, or >> - have timeouts that are denominated in seconds (i.e. end in 000) >> >> This will also allow conversion of yet more sites that use (sec * HZ) >> directly, and improve their readability. >> >> TO: K. Y. Srinivasan <k...@microsoft.com> >> TO: Haiyang Zhang <haiya...@microsoft.com> >> TO: Wei Liu <wei....@kernel.org> >> TO: Dexuan Cui <de...@microsoft.com> >> TO: linux-hyperv@vger.kernel.org >> TO: Anna-Maria Behnsen <anna-ma...@linutronix.de> >> TO: Thomas Gleixner <t...@linutronix.de> >> TO: Geert Uytterhoeven <ge...@linux-m68k.org> >> TO: Marcel Holtmann <mar...@holtmann.org> >> TO: Johan Hedberg <johan.hedb...@gmail.com> >> TO: Luiz Augusto von Dentz <luiz.de...@gmail.com> >> TO: linux-blueto...@vger.kernel.org >> TO: linux-ker...@vger.kernel.org >> Suggested-by: Michael Kelley <mhkli...@outlook.com> >> Reviewed-by: Luiz Augusto von Dentz <luiz.von.de...@intel.com> >> Signed-off-by: Easwar Hariharan <eahar...@linux.microsoft.com> >> --- >> include/linux/jiffies.h | 12 ++++++++++++ >> net/bluetooth/hci_event.c | 2 -- >> 2 files changed, 12 insertions(+), 2 deletions(-) >> >> diff --git a/include/linux/jiffies.h b/include/linux/jiffies.h >> index >> 1220f0fbe5bf9fb6c559b4efd603db3e97db9b65..e17c220ed56e587fd55fb9cf4a133a5 >> 3588af940 100644 >> --- a/include/linux/jiffies.h >> +++ b/include/linux/jiffies.h >> @@ -526,6 +526,18 @@ static __always_inline unsigned long >> msecs_to_jiffies(const unsigned int m) >> } >> } >> >> +/** >> + * secs_to_jiffies: - convert seconds to jiffies >> + * @_secs: time in seconds >> + * >> + * Conversion is done by simple multiplication with HZ >> + * secs_to_jiffies() is defined as a macro rather than a static inline >> + * function due to its potential application in struct initializers. >> + * >> + * Return: jiffies value >> + */ >> +#define secs_to_jiffies(_secs) ((_secs) * HZ) >> + >> extern unsigned long __usecs_to_jiffies(const unsigned int u); >> #if !(USEC_PER_SEC % HZ) >> static inline unsigned long _usecs_to_jiffies(const unsigned int u) >> diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c >> index >> 0bbad90ddd6f87e87c03859bae48a7901d39b634..7b35c58bbbeb79f2b50a02212771fb2 >> 83ba5643d 100644 >> --- a/net/bluetooth/hci_event.c >> +++ b/net/bluetooth/hci_event.c >> @@ -42,8 +42,6 @@ >> #define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \ >> "\x00\x00\x00\x00\x00\x00\x00\x00" >> >> -#define secs_to_jiffies(_secs) msecs_to_jiffies((_secs) * 1000) >> - >> /* Handle HCI Event packets */ >> >> static void *hci_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb, >> >> -- >> 2.34.1 > > All looks good. > But can you consider naming the macro as s2jiffy()? Just > to be shorter, so after adopting this macro we don't have > to split some lines for over 80 characters:) > > Thanks, > - Haiyang >
Thanks for the review! The patch introducing the macro has already been accepted into timers/core in tip[1], so unfortunately I can't make that change anymore. For readability considerations, I also find it better to match the remaining APIs in the jiffies family, i.e. msecs_to_jiffies(), nsecs_to_jiffies(), usecs_to_jiffies(). [1] https://git.kernel.org/tip/b35108a51cf7bab58d7eace1267d7965978bcdb8 Thanks, Easwar
