From: Jisheng Zhang <jszhang3@mail.ustc.edu.cn> To: Dave Young <dyoung@redhat.com>, Baoquan He <bhe@redhat.com>, Vivek Goyal <vgoyal@redhat.com> Cc: kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH] fs/proc/vmcore: hide mmap_vmcore_fault() and vmcore_mmap_ops for nommu Date: Sat, 12 Jun 2021 21:09:53 +0800 [thread overview] Message-ID: <20210612210953.34dff323@xhacker> (raw) From: Jisheng Zhang <jszhang@kernel.org> Without CONFIG_MMU, we get a W=1 build warning: fs/proc/vmcore.c:443:42: warning: unused variable 'vmcore_mmap_ops' [-Wunused-const-variable] static const struct vm_operations_struct vmcore_mmap_ops = { The vmcore_mmap_ops is only referenced from an #ifdef'ed caller, so this uses the same #ifdef around vmcore_mmap_ops and mmap_vmcore_fault(). Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Jisheng Zhang <jszhang@kernel.org> --- fs/proc/vmcore.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c index 9a15334da208..d902a67cc3ea 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -401,6 +401,7 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer, return __read_vmcore((__force char *) buffer, buflen, fpos, 1); } +#ifdef CONFIG_MMU /* * The vmcore fault handler uses the page cache and fills data using the * standard __vmcore_read() function. @@ -443,6 +444,7 @@ static vm_fault_t mmap_vmcore_fault(struct vm_fault *vmf) static const struct vm_operations_struct vmcore_mmap_ops = { .fault = mmap_vmcore_fault, }; +#endif /** * vmcore_alloc_buf - allocate buffer in vmalloc memory -- 2.32.0
WARNING: multiple messages have this Message-ID (diff)
From: Jisheng Zhang <jszhang3@mail.ustc.edu.cn> To: Dave Young <dyoung@redhat.com>, Baoquan He <bhe@redhat.com>, Vivek Goyal <vgoyal@redhat.com> Cc: kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH] fs/proc/vmcore: hide mmap_vmcore_fault() and vmcore_mmap_ops for nommu Date: Sat, 12 Jun 2021 21:09:53 +0800 [thread overview] Message-ID: <20210612210953.34dff323@xhacker> (raw) From: Jisheng Zhang <jszhang@kernel.org> Without CONFIG_MMU, we get a W=1 build warning: fs/proc/vmcore.c:443:42: warning: unused variable 'vmcore_mmap_ops' [-Wunused-const-variable] static const struct vm_operations_struct vmcore_mmap_ops = { The vmcore_mmap_ops is only referenced from an #ifdef'ed caller, so this uses the same #ifdef around vmcore_mmap_ops and mmap_vmcore_fault(). Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Jisheng Zhang <jszhang@kernel.org> --- fs/proc/vmcore.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c index 9a15334da208..d902a67cc3ea 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -401,6 +401,7 @@ static ssize_t read_vmcore(struct file *file, char __user *buffer, return __read_vmcore((__force char *) buffer, buflen, fpos, 1); } +#ifdef CONFIG_MMU /* * The vmcore fault handler uses the page cache and fills data using the * standard __vmcore_read() function. @@ -443,6 +444,7 @@ static vm_fault_t mmap_vmcore_fault(struct vm_fault *vmf) static const struct vm_operations_struct vmcore_mmap_ops = { .fault = mmap_vmcore_fault, }; +#endif /** * vmcore_alloc_buf - allocate buffer in vmalloc memory -- 2.32.0 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec
next reply other threads:[~2021-06-12 13:15 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-06-12 13:09 Jisheng Zhang [this message] 2021-06-12 13:09 ` [PATCH] fs/proc/vmcore: hide mmap_vmcore_fault() and vmcore_mmap_ops for nommu Jisheng Zhang
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