Subject: + ipc-update-locking-scheme-comments-fix.patch added to -mm tree To: akpm@xxxxxxxxxxxxxxxxxxxx,davidlohr@xxxxxx From: akpm@xxxxxxxxxxxxxxxxxxxx Date: Thu, 03 Oct 2013 12:40:03 -0700 The patch titled Subject: ipc-update-locking-scheme-comments-fix has been added to the -mm tree. Its filename is ipc-update-locking-scheme-comments-fix.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/ipc-update-locking-scheme-comments-fix.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/ipc-update-locking-scheme-comments-fix.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Subject: ipc-update-locking-scheme-comments-fix make it more readable in 80 columns Cc: Davidlohr Bueso <davidlohr@xxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- ipc/util.c | 30 ++++++++++++++++++------------ 1 file changed, 18 insertions(+), 12 deletions(-) diff -puN ipc/util.c~ipc-update-locking-scheme-comments-fix ipc/util.c --- a/ipc/util.c~ipc-update-locking-scheme-comments-fix +++ a/ipc/util.c @@ -17,21 +17,27 @@ * Pavel Emelianov <xemul@xxxxxxxxxx> * * General sysv ipc locking scheme: - * rcu_read_lock() - * obtain the ipc object (kern_ipc_perm) by looking up the id in an idr tree. - * - perform initial checks (capabilities, auditing and permission, etc). - * - perform read-only operations, such as STAT, INFO commands. - * acquire the ipc lock (kern_ipc_perm.lock) through ipc_lock_object() - * - perform data updates, such as SET, RMID commands and - * mechanism-specific operations (semop/semtimedop, msgsnd/msgrcv, shmat/shmdt). - * drop the ipc lock, through ipc_unlock_object(). - * rcu_read_unlock() + * rcu_read_lock() + * obtain the ipc object (kern_ipc_perm) by looking up the id in an idr + * tree. + * - perform initial checks (capabilities, auditing and permission, + * etc). + * - perform read-only operations, such as STAT, INFO commands. + * acquire the ipc lock (kern_ipc_perm.lock) through + * ipc_lock_object() + * - perform data updates, such as SET, RMID commands and + * mechanism-specific operations (semop/semtimedop, + * msgsnd/msgrcv, shmat/shmdt). + * drop the ipc lock, through ipc_unlock_object(). + * rcu_read_unlock() * * The ids->rwsem must be taken when: - * - creating, removing and iterating the existing entries in ipc identifier sets. - * - iterating through /proc/sysvipc/* files. + * - creating, removing and iterating the existing entries in ipc + * identifier sets. + * - iterating through /proc/sysvipc/* files. * - * Note that sems have a special fast path that avoids kern_ipc_perm.lock - see sem_lock(). + * Note that sems have a special fast path that avoids kern_ipc_perm.lock - + * see sem_lock(). */ #include <linux/mm.h> _ Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are origin.patch arch-alpha-kernel-systblss-remove-debug-check.patch i-need-old-gcc.patch ipc-update-locking-scheme-comments-fix.patch kernel-time-tick-commonc-document-tick_do_timer_cpu.patch makefile-enable-werror=implicit-int-and-werror=strict-prototypes-by-default.patch mm-readaheadc-do_readhead-dont-check-for-readpage.patch mm.patch mm-thp-khugepaged-add-policy-for-finding-target-node-fix.patch kernel-printk-printkc-convert-to-pr_foo.patch checkpatch-extend-camelcase-types-and-ignore-existing-camelcase-uses-in-a-patch.patch checkpatch-add-test-for-defines-of-arch_has_foo.patch binfmt_elfc-use-get_random_int-to-fix-entropy-depleting.patch fat-additions-to-support-fat_fallocate.patch fat-additions-to-support-fat_fallocate-v6-checkpatch-fixes.patch gcov-add-support-for-gcc-47-gcov-format-fix.patch gcov-add-support-for-gcc-47-gcov-format-fix-fix.patch gcov-add-support-for-gcc-47-gcov-format-checkpatch-fixes.patch kernel-modulec-use-pr_foo.patch kernel-gcov-fsc-use-pr_warn.patch linux-next.patch linux-next-git-rejects.patch mm-drop-actor-argument-of-do_generic_file_read-fix.patch debugging-keep-track-of-page-owners-fix-2-fix.patch debugging-keep-track-of-page-owners-fix-2-fix-fix-fix.patch journal_add_journal_head-debug.patch kernel-forkc-export-kernel_thread-to-modules.patch mutex-subsystem-synchro-test-module.patch slab-leaks3-default-y.patch put_bh-debug.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html