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| author | Buland Singh <bsingh@redhat.com> | 2018-12-20 17:35:24 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-27 09:30:24 +0200 |
| commit | 57e5f1a704658ea0319f5c066af9db32c5105dd0 (patch) | |
| tree | 7487df0d21624288a31d990c773a5301b191b258 /drivers/char | |
| parent | d55c5d7c88741d48c2e6fb4d9f8dbc8e957fe501 (diff) | |
| download | linux-stable-57e5f1a704658ea0319f5c066af9db32c5105dd0.tar.gz linux-stable-57e5f1a704658ea0319f5c066af9db32c5105dd0.tar.bz2 linux-stable-57e5f1a704658ea0319f5c066af9db32c5105dd0.zip | |
hpet: Fix missing '=' character in the __setup() code of hpet_mmap_enable
[ Upstream commit 24d48a61f2666630da130cc2ec2e526eacf229e3 ]
Commit '3d035f580699 ("drivers/char/hpet.c: allow user controlled mmap for
user processes")' introduced a new kernel command line parameter hpet_mmap,
that is required to expose the memory map of the HPET registers to
user-space. Unfortunately the kernel command line parameter 'hpet_mmap' is
broken and never takes effect due to missing '=' character in the __setup()
code of hpet_mmap_enable.
Before this patch:
dmesg output with the kernel command line parameter hpet_mmap=1
[ 0.204152] HPET mmap disabled
dmesg output with the kernel command line parameter hpet_mmap=0
[ 0.204192] HPET mmap disabled
After this patch:
dmesg output with the kernel command line parameter hpet_mmap=1
[ 0.203945] HPET mmap enabled
dmesg output with the kernel command line parameter hpet_mmap=0
[ 0.204652] HPET mmap disabled
Fixes: 3d035f580699 ("drivers/char/hpet.c: allow user controlled mmap for user processes")
Signed-off-by: Buland Singh <bsingh@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/hpet.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index d5d4cd82b9f7..978a782f5e30 100644 --- a/drivers/char/hpet.c +++ b/drivers/char/hpet.c @@ -377,7 +377,7 @@ static __init int hpet_mmap_enable(char *str) pr_info("HPET mmap %s\n", hpet_mmap_enabled ? "enabled" : "disabled"); return 1; } -__setup("hpet_mmap", hpet_mmap_enable); +__setup("hpet_mmap=", hpet_mmap_enable); static int hpet_mmap(struct file *file, struct vm_area_struct *vma) { |