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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-09 09:54:46 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-09 09:54:46 -0700 |
commit | a5ad5742f671de906adbf29fbedf0a04705cebad (patch) | |
tree | 88d1a4c18e2025a5a8335dbbc9dea8bebeba5789 /ipc/shm.c | |
parent | 013b2deba9a6b80ca02f4fafd7dedf875e9b4450 (diff) | |
parent | 4fa7252338a56fbc90220e6330f136a379175a7a (diff) | |
download | linux-a5ad5742f671de906adbf29fbedf0a04705cebad.tar.gz linux-a5ad5742f671de906adbf29fbedf0a04705cebad.tar.bz2 linux-a5ad5742f671de906adbf29fbedf0a04705cebad.zip |
Merge branch 'akpm' (patches from Andrew)
Merge even more updates from Andrew Morton:
- a kernel-wide sweep of show_stack()
- pagetable cleanups
- abstract out accesses to mmap_sem - prep for mmap_sem scalability work
- hch's user acess work
Subsystems affected by this patch series: debug, mm/pagemap, mm/maccess,
mm/documentation.
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (93 commits)
include/linux/cache.h: expand documentation over __read_mostly
maccess: return -ERANGE when probe_kernel_read() fails
x86: use non-set_fs based maccess routines
maccess: allow architectures to provide kernel probing directly
maccess: move user access routines together
maccess: always use strict semantics for probe_kernel_read
maccess: remove strncpy_from_unsafe
tracing/kprobes: handle mixed kernel/userspace probes better
bpf: rework the compat kernel probe handling
bpf:bpf_seq_printf(): handle potentially unsafe format string better
bpf: handle the compat string in bpf_trace_copy_string better
bpf: factor out a bpf_trace_copy_string helper
maccess: unify the probe kernel arch hooks
maccess: remove probe_read_common and probe_write_common
maccess: rename strnlen_unsafe_user to strnlen_user_nofault
maccess: rename strncpy_from_unsafe_strict to strncpy_from_kernel_nofault
maccess: rename strncpy_from_unsafe_user to strncpy_from_user_nofault
maccess: update the top of file comment
maccess: clarify kerneldoc comments
maccess: remove duplicate kerneldoc comments
...
Diffstat (limited to 'ipc/shm.c')
-rw-r--r-- | ipc/shm.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/ipc/shm.c b/ipc/shm.c index 0ba6add05b35..0a6dd94afa21 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -1544,7 +1544,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, if (err) goto out_fput; - if (down_write_killable(¤t->mm->mmap_sem)) { + if (mmap_write_lock_killable(current->mm)) { err = -EINTR; goto out_fput; } @@ -1564,7 +1564,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, if (IS_ERR_VALUE(addr)) err = (long)addr; invalid: - up_write(¤t->mm->mmap_sem); + mmap_write_unlock(current->mm); if (populate) mm_populate(addr, populate); @@ -1638,7 +1638,7 @@ long ksys_shmdt(char __user *shmaddr) if (addr & ~PAGE_MASK) return retval; - if (down_write_killable(&mm->mmap_sem)) + if (mmap_write_lock_killable(mm)) return -EINTR; /* @@ -1726,7 +1726,7 @@ long ksys_shmdt(char __user *shmaddr) #endif - up_write(&mm->mmap_sem); + mmap_write_unlock(mm); return retval; } |