cpumask: make cpumask_size() return "unsigned int"
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Web: https://git.kernel.org/torvalds/c/4de373a12f3c551f9263f37d609f264b440adfec Commit: 4de373a12f3c551f9263f37d609f264b440adfec Parent: 667b60946ef9b8375085c7b225229923c6f87308 Refname: refs/heads/master Author: Alexey Dobriyan <[email protected]> AuthorDate: Tue Feb 6 15:39:37 2018 -0800 Committer: Linus Torvalds <[email protected]> CommitDate: Tue Feb 6 18:32:45 2018 -0800 cpumask: make cpumask_size() return "unsigned int" CPUmasks are never big enough to warrant 64-bit code. Space savings: add/remove: 0/0 grow/shrink: 1/4 up/down: 3/-17 (-14) Function old new delta sched_init_numa 1530 1533 +3 compat_sys_sched_setaffinity 160 159 -1 sys_sched_getaffinity 197 195 -2 sys_sched_setaffinity 183 176 -7 compat_sys_sched_getaffinity 179 172 -7 Link: http://lkml.kernel.org/r/20171204165531.GA8221@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Peter Zijlstra <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> --- include/linux/cpumask.h | 2 +- kernel/compat.c | 2 +- kernel/sched/core.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 75b565194437..d4a2a7dcd72d 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -640,7 +640,7 @@ static inline int cpulist_parse(const char *buf, struct cpumask *dstp) /** * cpumask_size - size to allocate for a 'struct cpumask' in bytes */ -static inline size_t cpumask_size(void) +static inline unsigned int cpumask_size(void) { return BITS_TO_LONGS(nr_cpumask_bits) * sizeof(long); } diff --git a/kernel/compat.c b/kernel/compat.c index d1cee656a7ed..3247fe761f60 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -355,7 +355,7 @@ COMPAT_SYSCALL_DEFINE3(sched_getaffinity, compat_pid_t, pid, unsigned int, len, ret = sched_getaffinity(pid, mask); if (ret == 0) { - size_t retlen = min_t(size_t, len, cpumask_size()); + unsigned int retlen = min(len, cpumask_size()); if (compat_put_bitmap(user_mask_ptr, cpumask_bits(mask), retlen * 8)) ret = -EFAULT; diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 3da7a2444a91..d99fb5bf61ec 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4853,7 +4853,7 @@ SYSCALL_DEFINE3(sched_getaffinity, pid_t, pid, unsigned int, len, ret = sched_getaffinity(pid, mask); if (ret == 0) { - size_t retlen = min_t(size_t, len, cpumask_size()); + unsigned int retlen = min(len, cpumask_size()); if (copy_to_user(user_mask_ptr, mask, retlen)) ret = -EFAULT; -- To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html