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Message-ID: <4F288178.4040405@gmail.com>
Date: Wed, 01 Feb 2012 11:04:08 +1100
From: Ryan Mallon <rmallon@...il.com>
To: Joe Perches <joe@...ches.com>
CC: Jan Harkes <jaharkes@...cmu.edu>, coda@...cmu.edu,
codalist@...a.cs.cmu.edu, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] coda: Remove unnecessary OOM messages
On 01/02/12 09:42, Joe Perches wrote:
> Per call site OOM messages are unnecessary.
> k.alloc and v.alloc failures use dump_stack().
>
> Signed-off-by: Joe Perches <joe@...ches.com>
> ---
> fs/coda/coda_linux.h | 13 ++++++-------
> 1 files changed, 6 insertions(+), 7 deletions(-)
>
> diff --git a/fs/coda/coda_linux.h b/fs/coda/coda_linux.h
> index cc0ea9f..7b2c3a1 100644
> --- a/fs/coda/coda_linux.h
> +++ b/fs/coda/coda_linux.h
> @@ -57,13 +57,12 @@ unsigned short coda_flags_to_cflags(unsigned short);
> void coda_sysctl_init(void);
> void coda_sysctl_clean(void);
>
> -#define CODA_ALLOC(ptr, cast, size) do { \
> - if (size < PAGE_SIZE) \
> - ptr = kzalloc((unsigned long) size, GFP_KERNEL); \
> - else \
> - ptr = (cast)vzalloc((unsigned long) size); \
> - if (!ptr) \
> - printk("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__); \
> +#define CODA_ALLOC(ptr, cast, size) \
> +do { \
> + if (size < PAGE_SIZE) \
> + ptr = kzalloc(size, GFP_KERNEL); \
> + else \
> + ptr = vzalloc(size); \
> } while (0)
>
Hi Joe,
Since CODA_ALLOC no longer uses __FILE__ and __LINE__ and doesn't use
the cast argument any more, it can be replaced with a static inline
function. Something like this (untested, applies on top of your patch):
----
Since CODA_ALLOC no longer needs to be defined as a macro, replace it
with a static inline function and make it return the allocated pointer.
Rename it to coda_alloc to be more consistent with other function
naming. Similarly, replace CODA_FREE with a static inline function.
Also fix a bug in coda_psdev_write where the return value of CODA_ALLOC
was not being checked.
Signed-off-by: Ryan Mallon <rmallon@...il.com>
---
diff --git a/fs/coda/coda_linux.h b/fs/coda/coda_linux.h
index 7b2c3a1..f5da0a7 100644
--- a/fs/coda/coda_linux.h
+++ b/fs/coda/coda_linux.h
@@ -57,17 +57,20 @@ unsigned short coda_flags_to_cflags(unsigned short);
void coda_sysctl_init(void);
void coda_sysctl_clean(void);
-#define CODA_ALLOC(ptr, cast, size) \
-do { \
- if (size < PAGE_SIZE) \
- ptr = kzalloc(size, GFP_KERNEL); \
- else \
- ptr = vzalloc(size); \
-} while (0)
-
+static inline void *coda_alloc(size_t size)
+{
+ if (size < PAGE_SIZE)
+ return kzalloc(size, GFP_KERNEL);
+ return vzalloc(size);
+}
-#define CODA_FREE(ptr,size) \
- do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
+static inline void coda_free(const void *ptr, size_t size)
+{
+ if (size < PAGE_SIZE)
+ kfree(ptr);
+ else
+ vfree(ptr);
+}
/* inode to cnode access functions */
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index 8f616e0..4afcb81 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -124,9 +124,13 @@ static ssize_t coda_psdev_write(struct file *file, const char __user *buf,
hdr.opcode, hdr.unique);
nbytes = size;
}
- CODA_ALLOC(dcbuf, union outputArgs *, nbytes);
+ dcbuf = coda_alloc(nbytes);
+ if (!dcbuf) {
+ retval = -ENOMEM;
+ goto out;
+ }
if (copy_from_user(dcbuf, buf, nbytes)) {
- CODA_FREE(dcbuf, nbytes);
+ coda_free(dcbuf, nbytes);
retval = -EFAULT;
goto out;
}
@@ -134,7 +138,7 @@ static ssize_t coda_psdev_write(struct file *file, const char __user *buf,
/* what downcall errors does Venus handle ? */
error = coda_downcall(vcp, hdr.opcode, dcbuf);
- CODA_FREE(dcbuf, nbytes);
+ coda_free(dcbuf, nbytes);
if (error) {
printk("psdev_write: coda_downcall error: %d\n", error);
retval = error;
@@ -255,7 +259,7 @@ static ssize_t coda_psdev_read(struct file * file, char __user * buf,
goto out;
}
- CODA_FREE(req->uc_data, sizeof(struct coda_in_hdr));
+ coda_free(req->uc_data, sizeof(struct coda_in_hdr));
kfree(req);
out:
mutex_unlock(&vcp->vc_mutex);
@@ -311,7 +315,7 @@ static int coda_psdev_release(struct inode * inode, struct file * file)
/* Async requests need to be freed here */
if (req->uc_flags & CODA_REQ_ASYNC) {
- CODA_FREE(req->uc_data, sizeof(struct coda_in_hdr));
+ coda_free(req->uc_data, sizeof(struct coda_in_hdr));
kfree(req);
continue;
}
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index 9727e0c..5c43991 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -46,7 +46,7 @@ static void *alloc_upcall(int opcode, int size)
{
union inputArgs *inp;
- CODA_ALLOC(inp, union inputArgs *, size);
+ inp = coda_alloc(size);
if (!inp)
return ERR_PTR(-ENOMEM);
@@ -85,7 +85,7 @@ int venus_rootfid(struct super_block *sb, struct CodaFid *fidp)
if (!error)
*fidp = outp->coda_root.VFid;
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -104,7 +104,7 @@ int venus_getattr(struct super_block *sb, struct CodaFid *fid,
if (!error)
*attr = outp->coda_getattr.attr;
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -123,7 +123,7 @@ int venus_setattr(struct super_block *sb, struct CodaFid *fid,
error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -153,7 +153,7 @@ int venus_lookup(struct super_block *sb, struct CodaFid *fid,
*type = outp->coda_lookup.vtype;
}
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -173,7 +173,7 @@ int venus_close(struct super_block *sb, struct CodaFid *fid, int flags,
error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -194,7 +194,7 @@ int venus_open(struct super_block *sb, struct CodaFid *fid,
if (!error)
*fh = outp->coda_open_by_fd.fh;
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -224,7 +224,7 @@ int venus_mkdir(struct super_block *sb, struct CodaFid *dirfid,
*newfid = outp->coda_mkdir.VFid;
}
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -262,7 +262,7 @@ int venus_rename(struct super_block *sb, struct CodaFid *old_fid,
error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -295,7 +295,7 @@ int venus_create(struct super_block *sb, struct CodaFid *dirfid,
*newfid = outp->coda_create.VFid;
}
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -318,7 +318,7 @@ int venus_rmdir(struct super_block *sb, struct CodaFid *dirfid,
error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -340,7 +340,7 @@ int venus_remove(struct super_block *sb, struct CodaFid *dirfid,
error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -370,7 +370,7 @@ int venus_readlink(struct super_block *sb, struct CodaFid *fid,
*(buffer + retlen) = '\0';
}
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -398,7 +398,7 @@ int venus_link(struct super_block *sb, struct CodaFid *fid,
error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -433,7 +433,7 @@ int venus_symlink(struct super_block *sb, struct CodaFid *fid,
error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -450,7 +450,7 @@ int venus_fsync(struct super_block *sb, struct CodaFid *fid)
error = coda_upcall(coda_vcp(sb), sizeof(union inputArgs),
&outsize, inp);
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -468,7 +468,7 @@ int venus_access(struct super_block *sb, struct CodaFid *fid, int mask)
error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -544,7 +544,7 @@ int venus_pioctl(struct super_block *sb, struct CodaFid *fid,
}
exit:
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -566,7 +566,7 @@ int venus_statfs(struct dentry *dentry, struct kstatfs *sfs)
sfs->f_ffree = outp->coda_statfs.stat.f_ffree;
}
- CODA_FREE(inp, insize);
+ coda_free(inp, insize);
return error;
}
@@ -744,7 +744,7 @@ static int coda_upcall(struct venus_comm *vcp,
sig_req = kmalloc(sizeof(struct upc_req), GFP_KERNEL);
if (!sig_req) goto exit;
- CODA_ALLOC((sig_req->uc_data), char *, sizeof(struct coda_in_hdr));
+ sig_req->uc_data = coda_alloc(sizeof(struct coda_in_hdr));
if (!sig_req->uc_data) {
kfree(sig_req);
goto exit;
--
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