uml: fix build when SLOB is enabled

Reintroduce uml_kmalloc for the benefit of UML libc code.  The
previous tactic of declaring __kmalloc so it could be called directly
from the libc side of the house turned out to be getting too intimate
with slab, and it doesn't work with slob.

So, the uml_kmalloc wrapper is back.  It calls kmalloc or whatever
that translates into, and libc code calls it.

kfree is left alone since that still works, leaving a somewhat
inconsistent API.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

17 files changed, 28 insertions, 24 deletions

diff --git a/arch/um/drivers/chan_user.c b/arch/um/drivers/chan_user.c
index 025764089ac8..cfeb3f4a44af 100644
--- a/arch/um/drivers/chan_user.c
+++ b/arch/um/drivers/chan_user.c
@@ -11,6 +11,7 @@
 #include <termios.h>
 #include <sys/ioctl.h>
 #include "chan_user.h"
+#include "kern_constants.h"
 #include "os.h"
 #include "um_malloc.h"
 #include "user.h"
diff --git a/arch/um/drivers/cow_sys.h b/arch/um/drivers/cow_sys.h
index ca8c9e11a39b..f5701fd2ef90 100644
--- a/arch/um/drivers/cow_sys.h
+++ b/arch/um/drivers/cow_sys.h
@@ -8,7 +8,7 @@
 
 static inline void *cow_malloc(int size)
 {
-        return kmalloc(size, UM_GFP_KERNEL);
+        return uml_kmalloc(size, UM_GFP_KERNEL);
 }
 
 static inline void cow_free(void *ptr)
diff --git a/arch/um/drivers/daemon_user.c b/arch/um/drivers/daemon_user.c
index f23c109a055c..f8e85e0bdace 100644
--- a/arch/um/drivers/daemon_user.c
+++ b/arch/um/drivers/daemon_user.c
@@ -34,7 +34,7 @@ static struct sockaddr_un *new_addr(void *name, int len)
 {
         struct sockaddr_un *sun;
 
-        sun = kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
+        sun = uml_kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
         if (sun == NULL) {
                 printk(UM_KERN_ERR "new_addr: allocation of sockaddr_un "
                        "failed\n");
@@ -83,7 +83,7 @@ static int connect_to_switch(struct daemon_data *pri)
                 goto out_close;
         }
 
-        sun = kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
+        sun = uml_kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
         if (sun == NULL) {
                 printk(UM_KERN_ERR "new_addr: allocation of sockaddr_un "
                        "failed\n");
diff --git a/arch/um/drivers/fd.c b/arch/um/drivers/fd.c
index 0a2bb5b64b82..f5a981a16240 100644
--- a/arch/um/drivers/fd.c
+++ b/arch/um/drivers/fd.c
@@ -40,7 +40,7 @@ static void *fd_init(char *str, int device, const struct chan_opts *opts)
                 return NULL;
         }
 
-        data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
+        data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
         if (data == NULL)
                 return NULL;
 
diff --git a/arch/um/drivers/mcast_user.c b/arch/um/drivers/mcast_user.c
index 5f647d7a7292..ee19e91568a2 100644
--- a/arch/um/drivers/mcast_user.c
+++ b/arch/um/drivers/mcast_user.c
@@ -15,6 +15,7 @@
 #include <unistd.h>
 #include <errno.h>
 #include <netinet/in.h>
+#include "kern_constants.h"
 #include "mcast.h"
 #include "net_user.h"
 #include "um_malloc.h"
@@ -24,7 +25,7 @@ static struct sockaddr_in *new_addr(char *addr, unsigned short port)
 {
         struct sockaddr_in *sin;
 
-        sin = kmalloc(sizeof(struct sockaddr_in), UM_GFP_KERNEL);
+        sin = uml_kmalloc(sizeof(struct sockaddr_in), UM_GFP_KERNEL);
         if (sin == NULL) {
                 printk(UM_KERN_ERR "new_addr: allocation of sockaddr_in "
                        "failed\n");
diff --git a/arch/um/drivers/net_user.c b/arch/um/drivers/net_user.c
index abf2653f5517..9415dd9e63ef 100644
--- a/arch/um/drivers/net_user.c
+++ b/arch/um/drivers/net_user.c
@@ -222,7 +222,7 @@ static void change(char *dev, char *what, unsigned char *addr,
                 netmask[2], netmask[3]);
 
         output_len = UM_KERN_PAGE_SIZE;
-        output = kmalloc(output_len, UM_GFP_KERNEL);
+        output = uml_kmalloc(output_len, UM_GFP_KERNEL);
         if (output == NULL)
                 printk(UM_KERN_ERR "change : failed to allocate output "
                        "buffer\n");
diff --git a/arch/um/drivers/port_user.c b/arch/um/drivers/port_user.c
index d269ca387f10..b49bf56a56aa 100644
--- a/arch/um/drivers/port_user.c
+++ b/arch/um/drivers/port_user.c
@@ -47,7 +47,7 @@ static void *port_init(char *str, int device, const struct chan_opts *opts)
         if (kern_data == NULL)
                 return NULL;
 
-        data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
+        data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
         if (data == NULL)
                 goto err;
 
diff --git a/arch/um/drivers/pty.c b/arch/um/drivers/pty.c
index 49c79dda6046..1113911dcb2b 100644
--- a/arch/um/drivers/pty.c
+++ b/arch/um/drivers/pty.c
@@ -29,7 +29,7 @@ static void *pty_chan_init(char *str, int device, const struct chan_opts *opts)
 {
         struct pty_chan *data;
 
-        data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
+        data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
         if (data == NULL)
                 return NULL;
 
diff --git a/arch/um/drivers/slip_user.c b/arch/um/drivers/slip_user.c
index 8b80505a3fb0..a1c2d2c98a94 100644
--- a/arch/um/drivers/slip_user.c
+++ b/arch/um/drivers/slip_user.c
@@ -96,7 +96,7 @@ static int slip_tramp(char **argv, int fd)
         pid = err;
 
         output_len = UM_KERN_PAGE_SIZE;
-        output = kmalloc(output_len, UM_GFP_KERNEL);
+        output = uml_kmalloc(output_len, UM_GFP_KERNEL);
         if (output == NULL) {
                 printk(UM_KERN_ERR "slip_tramp : failed to allocate output "
                        "buffer\n");
diff --git a/arch/um/drivers/tty.c b/arch/um/drivers/tty.c
index c930fedc5172..495858a090e4 100644
--- a/arch/um/drivers/tty.c
+++ b/arch/um/drivers/tty.c
@@ -29,7 +29,7 @@ static void *tty_chan_init(char *str, int device, const struct chan_opts *opts)
         }
         str++;
 
-        data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
+        data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
         if (data == NULL)
                 return NULL;
         *data = ((struct tty_chan) { .dev       = str,
diff --git a/arch/um/drivers/xterm.c b/arch/um/drivers/xterm.c
index 8a1c18a9b240..da2caa5a21ef 100644
--- a/arch/um/drivers/xterm.c
+++ b/arch/um/drivers/xterm.c
@@ -30,7 +30,7 @@ static void *xterm_init(char *str, int device, const struct chan_opts *opts)
 {
         struct xterm_chan *data;
 
-        data = kmalloc(sizeof(*data), UM_GFP_KERNEL);
+        data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
         if (data == NULL)
                 return NULL;
         *data = ((struct xterm_chan) { .pid             = -1,
diff --git a/arch/um/include/um_malloc.h b/arch/um/include/um_malloc.h
index 0ad17cb83d96..c554d706d106 100644
--- a/arch/um/include/um_malloc.h
+++ b/arch/um/include/um_malloc.h
@@ -8,15 +8,12 @@
 
 #include "kern_constants.h"
 
-extern void *__kmalloc(int size, int flags);
-static inline void *kmalloc(int size, int flags)
-{
-        return __kmalloc(size, flags);
-}
-
+extern void *uml_kmalloc(int size, int flags);
 extern void kfree(const void *ptr);
 
 extern void *vmalloc(unsigned long size);
 extern void vfree(void *ptr);
 
 #endif /* __UM_MALLOC_H__ */
+
+
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 2eea1ff235e6..b0ee64622ff7 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -375,3 +375,8 @@ pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
         return pmd;
 }
 #endif
+
+void *uml_kmalloc(int size, int flags)
+{
+        return kmalloc(size, flags);
+}
diff --git a/arch/um/os-Linux/drivers/ethertap_user.c b/arch/um/os-Linux/drivers/ethertap_user.c
index 6fb0b174f538..cc72cb2c1af6 100644
--- a/arch/um/os-Linux/drivers/ethertap_user.c
+++ b/arch/um/os-Linux/drivers/ethertap_user.c
@@ -52,7 +52,7 @@ static void etap_change(int op, unsigned char *addr, unsigned char *netmask,
                 return;
         }
 
-        output = kmalloc(UM_KERN_PAGE_SIZE, UM_GFP_KERNEL);
+        output = uml_kmalloc(UM_KERN_PAGE_SIZE, UM_GFP_KERNEL);
         if (output == NULL)
                 printk(UM_KERN_ERR "etap_change : Failed to allocate output "
                        "buffer\n");
@@ -165,7 +165,7 @@ static int etap_open(void *data)
         err = etap_tramp(pri->dev_name, pri->gate_addr, control_fds[0],
                          control_fds[1], data_fds[0], data_fds[1]);
         output_len = UM_KERN_PAGE_SIZE;
-        output = kmalloc(output_len, UM_GFP_KERNEL);
+        output = uml_kmalloc(output_len, UM_GFP_KERNEL);
         read_output(control_fds[0], output, output_len);
 
         if (output == NULL)
diff --git a/arch/um/os-Linux/helper.c b/arch/um/os-Linux/helper.c
index f25c29a12d00..74ca7aabf4e1 100644
--- a/arch/um/os-Linux/helper.c
+++ b/arch/um/os-Linux/helper.c
@@ -71,8 +71,8 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv)
         data.pre_data = pre_data;
         data.argv = argv;
         data.fd = fds[1];
-        data.buf = __cant_sleep() ? kmalloc(PATH_MAX, UM_GFP_ATOMIC) :
-                                        kmalloc(PATH_MAX, UM_GFP_KERNEL);
+        data.buf = __cant_sleep() ? uml_kmalloc(PATH_MAX, UM_GFP_ATOMIC) :
+                                        uml_kmalloc(PATH_MAX, UM_GFP_KERNEL);
         pid = clone(helper_child, (void *) sp, CLONE_VM, &data);
         if (pid < 0) {
                 ret = -errno;
diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c
index abb9b0ffd960..eee69b9f52c9 100644
--- a/arch/um/os-Linux/main.c
+++ b/arch/um/os-Linux/main.c
@@ -199,7 +199,7 @@ void *__wrap_malloc(int size)
                 return __real_malloc(size);
         else if (size <= UM_KERN_PAGE_SIZE)
                 /* finding contiguous pages can be hard*/
-                ret = kmalloc(size, UM_GFP_KERNEL);
+                ret = uml_kmalloc(size, UM_GFP_KERNEL);
         else ret = vmalloc(size);
 
         /*
diff --git a/arch/um/os-Linux/sigio.c b/arch/um/os-Linux/sigio.c
index abf47a7c4abd..0578481983c4 100644
--- a/arch/um/os-Linux/sigio.c
+++ b/arch/um/os-Linux/sigio.c
@@ -109,7 +109,7 @@ static int need_poll(struct pollfds *polls, int n)
         if (n <= polls->size)
                 return 0;
 
-        new = kmalloc(n * sizeof(struct pollfd), UM_GFP_ATOMIC);
+        new = uml_kmalloc(n * sizeof(struct pollfd), UM_GFP_ATOMIC);
         if (new == NULL) {
                 printk(UM_KERN_ERR "need_poll : failed to allocate new "
                        "pollfds\n");
@@ -243,7 +243,7 @@ static struct pollfd *setup_initial_poll(int fd)
 {
         struct pollfd *p;
 
-        p = kmalloc(sizeof(struct pollfd), UM_GFP_KERNEL);
+        p = uml_kmalloc(sizeof(struct pollfd), UM_GFP_KERNEL);
         if (p == NULL) {
                 printk(UM_KERN_ERR "setup_initial_poll : failed to allocate "
                        "poll\n");